diff --git a/src/Symfony/Component/Validator/CHANGELOG.md b/src/Symfony/Component/Validator/CHANGELOG.md
index c10797cabfa30..960195c95da4b 100644
--- a/src/Symfony/Component/Validator/CHANGELOG.md
+++ b/src/Symfony/Component/Validator/CHANGELOG.md
@@ -56,6 +56,8 @@ CHANGELOG
    ```
  * Add support for ratio checks for SVG files to the `Image` constraint
  * Add the `Slug` constraint
+ * Add support for the `otherwise` option in the `When` constraint
+ * Add support for multiple fields containing nested constraints in `Composite` constraints
 
 7.2
 ---
diff --git a/src/Symfony/Component/Validator/Constraints/Composite.php b/src/Symfony/Component/Validator/Constraints/Composite.php
index 8cd0edde7db7b..deac22cc5570d 100644
--- a/src/Symfony/Component/Validator/Constraints/Composite.php
+++ b/src/Symfony/Component/Validator/Constraints/Composite.php
@@ -55,57 +55,58 @@ public function __construct(mixed $options = null, ?array $groups = null, mixed
 
         $this->initializeNestedConstraints();
 
-        /* @var Constraint[] $nestedConstraints */
-        $compositeOption = $this->getCompositeOption();
-        $nestedConstraints = $this->$compositeOption;
+        foreach ((array) $this->getCompositeOption() as $option) {
+            /* @var Constraint[] $nestedConstraints */
+            $nestedConstraints = $this->$option;
 
-        if (!\is_array($nestedConstraints)) {
-            $nestedConstraints = [$nestedConstraints];
-        }
-
-        foreach ($nestedConstraints as $constraint) {
-            if (!$constraint instanceof Constraint) {
-                if (\is_object($constraint)) {
-                    $constraint = $constraint::class;
-                }
-
-                throw new ConstraintDefinitionException(\sprintf('The value "%s" is not an instance of Constraint in constraint "%s".', $constraint, static::class));
+            if (!\is_array($nestedConstraints)) {
+                $nestedConstraints = [$nestedConstraints];
             }
 
-            if ($constraint instanceof Valid) {
-                throw new ConstraintDefinitionException(\sprintf('The constraint Valid cannot be nested inside constraint "%s". You can only declare the Valid constraint directly on a field or method.', static::class));
-            }
-        }
+            foreach ($nestedConstraints as $constraint) {
+                if (!$constraint instanceof Constraint) {
+                    if (\is_object($constraint)) {
+                        $constraint = get_debug_type($constraint);
+                    }
 
-        if (!isset(((array) $this)['groups'])) {
-            $mergedGroups = [];
+                    throw new ConstraintDefinitionException(\sprintf('The value "%s" is not an instance of Constraint in constraint "%s".', $constraint, get_debug_type($this)));
+                }
 
-            foreach ($nestedConstraints as $constraint) {
-                foreach ($constraint->groups as $group) {
-                    $mergedGroups[$group] = true;
+                if ($constraint instanceof Valid) {
+                    throw new ConstraintDefinitionException(\sprintf('The constraint Valid cannot be nested inside constraint "%s". You can only declare the Valid constraint directly on a field or method.', get_debug_type($this)));
                 }
             }
 
-            // prevent empty composite constraint to have empty groups
-            $this->groups = array_keys($mergedGroups) ?: [self::DEFAULT_GROUP];
-            $this->$compositeOption = $nestedConstraints;
+            if (!isset(((array) $this)['groups'])) {
+                $mergedGroups = [];
 
-            return;
-        }
+                foreach ($nestedConstraints as $constraint) {
+                    foreach ($constraint->groups as $group) {
+                        $mergedGroups[$group] = true;
+                    }
+                }
+
+                // prevent empty composite constraint to have empty groups
+                $this->groups = array_keys($mergedGroups) ?: [self::DEFAULT_GROUP];
+                $this->$option = $nestedConstraints;
 
-        foreach ($nestedConstraints as $constraint) {
-            if (isset(((array) $constraint)['groups'])) {
-                $excessGroups = array_diff($constraint->groups, $this->groups);
+                continue;
+            }
 
-                if (\count($excessGroups) > 0) {
-                    throw new ConstraintDefinitionException(\sprintf('The group(s) "%s" passed to the constraint "%s" should also be passed to its containing constraint "%s".', implode('", "', $excessGroups), get_debug_type($constraint), static::class));
+            foreach ($nestedConstraints as $constraint) {
+                if (isset(((array) $constraint)['groups'])) {
+                    $excessGroups = array_diff($constraint->groups, $this->groups);
+
+                    if (\count($excessGroups) > 0) {
+                        throw new ConstraintDefinitionException(\sprintf('The group(s) "%s" passed to the constraint "%s" should also be passed to its containing constraint "%s".', implode('", "', $excessGroups), get_debug_type($constraint), get_debug_type($this)));
+                    }
+                } else {
+                    $constraint->groups = $this->groups;
                 }
-            } else {
-                $constraint->groups = $this->groups;
             }
-        }
 
-        $this->$compositeOption = $nestedConstraints;
+            $this->$option = $nestedConstraints;
+        }
     }
 
     /**
@@ -115,18 +116,20 @@ public function addImplicitGroupName(string $group): void
     {
         parent::addImplicitGroupName($group);
 
-        /** @var Constraint[] $nestedConstraints */
-        $nestedConstraints = $this->{$this->getCompositeOption()};
+        foreach ((array) $this->getCompositeOption() as $option) {
+            /* @var Constraint[] $nestedConstraints */
+            $nestedConstraints = (array) $this->$option;
 
-        foreach ($nestedConstraints as $constraint) {
-            $constraint->addImplicitGroupName($group);
+            foreach ($nestedConstraints as $constraint) {
+                $constraint->addImplicitGroupName($group);
+            }
         }
     }
 
     /**
      * Returns the name of the property that contains the nested constraints.
      */
-    abstract protected function getCompositeOption(): string;
+    abstract protected function getCompositeOption(): array|string;
 
     /**
      * @internal Used by metadata
@@ -135,8 +138,12 @@ abstract protected function getCompositeOption(): string;
      */
     public function getNestedConstraints(): array
     {
-        /* @var Constraint[] $nestedConstraints */
-        return $this->{$this->getCompositeOption()};
+        $constraints = [];
+        foreach ((array) $this->getCompositeOption() as $option) {
+            $constraints = array_merge($constraints, (array) $this->$option);
+        }
+
+        return $constraints;
     }
 
     /**
diff --git a/src/Symfony/Component/Validator/Constraints/When.php b/src/Symfony/Component/Validator/Constraints/When.php
index 12d5e7cc3eb42..5fe83ab53e12f 100644
--- a/src/Symfony/Component/Validator/Constraints/When.php
+++ b/src/Symfony/Component/Validator/Constraints/When.php
@@ -28,6 +28,7 @@ class When extends Composite
     public string|Expression $expression;
     public array|Constraint $constraints = [];
     public array $values = [];
+    public array|Constraint $otherwise = [];
 
     /**
      * @param string|Expression|array<string,mixed> $expression  The condition to evaluate, written with the ExpressionLanguage syntax
@@ -35,9 +36,10 @@ class When extends Composite
      * @param array<string,mixed>|null              $values      The values of the custom variables used in the expression (defaults to [])
      * @param string[]|null                         $groups
      * @param array<string,mixed>|null              $options
+     * @param Constraint[]|Constraint               $otherwise   One or multiple constraints that are applied if the expression returns false
      */
     #[HasNamedArguments]
-    public function __construct(string|Expression|array $expression, array|Constraint|null $constraints = null, ?array $values = null, ?array $groups = null, $payload = null, ?array $options = null)
+    public function __construct(string|Expression|array $expression, array|Constraint|null $constraints = null, ?array $values = null, ?array $groups = null, $payload = null, ?array $options = null, array|Constraint $otherwise = [])
     {
         if (!class_exists(ExpressionLanguage::class)) {
             throw new LogicException(\sprintf('The "symfony/expression-language" component is required to use the "%s" constraint. Try running "composer require symfony/expression-language".', __CLASS__));
@@ -56,12 +58,17 @@ public function __construct(string|Expression|array $expression, array|Constrain
 
             $options['expression'] = $expression;
             $options['constraints'] = $constraints;
+            $options['otherwise'] = $otherwise;
         }
 
-        if (isset($options['constraints']) && !\is_array($options['constraints'])) {
+        if (!\is_array($options['constraints'] ?? [])) {
             $options['constraints'] = [$options['constraints']];
         }
 
+        if (!\is_array($options['otherwise'] ?? [])) {
+            $options['otherwise'] = [$options['otherwise']];
+        }
+
         if (null !== $groups) {
             $options['groups'] = $groups;
         }
@@ -85,8 +92,8 @@ public function getTargets(): string|array
         return [self::CLASS_CONSTRAINT, self::PROPERTY_CONSTRAINT];
     }
 
-    protected function getCompositeOption(): string
+    protected function getCompositeOption(): array|string
     {
-        return 'constraints';
+        return ['constraints', 'otherwise'];
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/WhenValidator.php b/src/Symfony/Component/Validator/Constraints/WhenValidator.php
index b41ba83ff48df..272bd86e90f24 100644
--- a/src/Symfony/Component/Validator/Constraints/WhenValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/WhenValidator.php
@@ -35,9 +35,14 @@ public function validate(mixed $value, Constraint $constraint): void
         $variables['this'] = $context->getObject();
         $variables['context'] = $context;
 
-        if ($this->getExpressionLanguage()->evaluate($constraint->expression, $variables)) {
+        $result = $this->getExpressionLanguage()->evaluate($constraint->expression, $variables);
+
+        if ($result) {
             $context->getValidator()->inContext($context)
                 ->validate($value, $constraint->constraints);
+        } elseif ($constraint->otherwise) {
+            $context->getValidator()->inContext($context)
+                ->validate($value, $constraint->otherwise);
         }
     }
 
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php b/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
index a769a68e40809..9329ef1a2a022 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/CompositeTest.php
@@ -14,6 +14,7 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\Constraints\Composite;
+use Symfony\Component\Validator\Constraints\Length;
 use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Constraints\NotNull;
 use Symfony\Component\Validator\Constraints\Valid;
@@ -23,9 +24,14 @@ class ConcreteComposite extends Composite
 {
     public array|Constraint $constraints = [];
 
-    protected function getCompositeOption(): string
+    public function __construct(mixed $options = null, public array|Constraint $otherNested = [])
     {
-        return 'constraints';
+        parent::__construct($options);
+    }
+
+    protected function getCompositeOption(): array
+    {
+        return ['constraints', 'otherNested'];
     }
 
     public function getDefaultOption(): ?string
@@ -44,11 +50,14 @@ public function testConstraintHasDefaultGroup()
         $constraint = new ConcreteComposite([
             new NotNull(),
             new NotBlank(),
+        ], [
+            new Length(exactly: 10),
         ]);
 
         $this->assertEquals(['Default'], $constraint->groups);
         $this->assertEquals(['Default'], $constraint->constraints[0]->groups);
         $this->assertEquals(['Default'], $constraint->constraints[1]->groups);
+        $this->assertEquals(['Default'], $constraint->otherNested[0]->groups);
     }
 
     public function testNestedCompositeConstraintHasDefaultGroup()
@@ -68,11 +77,14 @@ public function testMergeNestedGroupsIfNoExplicitParentGroup()
         $constraint = new ConcreteComposite([
             new NotNull(groups: ['Default']),
             new NotBlank(groups: ['Default', 'Strict']),
+        ], [
+            new Length(exactly: 10, groups: ['Default', 'Strict']),
         ]);
 
         $this->assertEquals(['Default', 'Strict'], $constraint->groups);
         $this->assertEquals(['Default'], $constraint->constraints[0]->groups);
         $this->assertEquals(['Default', 'Strict'], $constraint->constraints[1]->groups);
+        $this->assertEquals(['Default', 'Strict'], $constraint->otherNested[0]->groups);
     }
 
     public function testSetImplicitNestedGroupsIfExplicitParentGroup()
@@ -82,12 +94,16 @@ public function testSetImplicitNestedGroupsIfExplicitParentGroup()
                 new NotNull(),
                 new NotBlank(),
             ],
+            'otherNested' => [
+                new Length(exactly: 10),
+            ],
             'groups' => ['Default', 'Strict'],
         ]);
 
         $this->assertEquals(['Default', 'Strict'], $constraint->groups);
         $this->assertEquals(['Default', 'Strict'], $constraint->constraints[0]->groups);
         $this->assertEquals(['Default', 'Strict'], $constraint->constraints[1]->groups);
+        $this->assertEquals(['Default', 'Strict'], $constraint->otherNested[0]->groups);
     }
 
     public function testExplicitNestedGroupsMustBeSubsetOfExplicitParentGroups()
@@ -97,12 +113,16 @@ public function testExplicitNestedGroupsMustBeSubsetOfExplicitParentGroups()
                 new NotNull(groups: ['Default']),
                 new NotBlank(groups: ['Strict']),
             ],
+            'otherNested' => [
+                new Length(exactly: 10, groups: ['Strict']),
+            ],
             'groups' => ['Default', 'Strict'],
         ]);
 
         $this->assertEquals(['Default', 'Strict'], $constraint->groups);
         $this->assertEquals(['Default'], $constraint->constraints[0]->groups);
         $this->assertEquals(['Strict'], $constraint->constraints[1]->groups);
+        $this->assertEquals(['Strict'], $constraint->otherNested[0]->groups);
     }
 
     public function testFailIfExplicitNestedGroupsNotSubsetOfExplicitParentGroups()
@@ -116,11 +136,27 @@ public function testFailIfExplicitNestedGroupsNotSubsetOfExplicitParentGroups()
         ]);
     }
 
+    public function testFailIfExplicitNestedGroupsNotSubsetOfExplicitParentGroupsInOtherNested()
+    {
+        $this->expectException(ConstraintDefinitionException::class);
+        new ConcreteComposite([
+            'constraints' => [
+                new NotNull(groups: ['Default']),
+            ],
+            'otherNested' => [
+                new NotNull(groups: ['Default', 'Foobar']),
+            ],
+            'groups' => ['Default', 'Strict'],
+        ]);
+    }
+
     public function testImplicitGroupNamesAreForwarded()
     {
         $constraint = new ConcreteComposite([
             new NotNull(groups: ['Default']),
             new NotBlank(groups: ['Strict']),
+        ], [
+            new Length(exactly: 10, groups: ['Default']),
         ]);
 
         $constraint->addImplicitGroupName('ImplicitGroup');
@@ -128,14 +164,17 @@ public function testImplicitGroupNamesAreForwarded()
         $this->assertEquals(['Default', 'Strict', 'ImplicitGroup'], $constraint->groups);
         $this->assertEquals(['Default', 'ImplicitGroup'], $constraint->constraints[0]->groups);
         $this->assertEquals(['Strict'], $constraint->constraints[1]->groups);
+        $this->assertEquals(['Default', 'ImplicitGroup'], $constraint->otherNested[0]->groups);
     }
 
     public function testSingleConstraintsAccepted()
     {
         $nestedConstraint = new NotNull();
-        $constraint = new ConcreteComposite($nestedConstraint);
+        $otherNestedConstraint = new Length(exactly: 10);
+        $constraint = new ConcreteComposite($nestedConstraint, $otherNestedConstraint);
 
         $this->assertEquals([$nestedConstraint], $constraint->constraints);
+        $this->assertEquals([$otherNestedConstraint], $constraint->otherNested);
     }
 
     public function testFailIfNoConstraint()
@@ -147,6 +186,15 @@ public function testFailIfNoConstraint()
         ]);
     }
 
+    public function testFailIfNoConstraintInAnotherNested()
+    {
+        $this->expectException(ConstraintDefinitionException::class);
+        new ConcreteComposite([new NotNull()], [
+            new NotNull(groups: ['Default']),
+            'NotBlank',
+        ]);
+    }
+
     public function testFailIfNoConstraintObject()
     {
         $this->expectException(ConstraintDefinitionException::class);
@@ -156,6 +204,15 @@ public function testFailIfNoConstraintObject()
         ]);
     }
 
+    public function testFailIfNoConstraintObjectInAnotherNested()
+    {
+        $this->expectException(ConstraintDefinitionException::class);
+        new ConcreteComposite([new NotNull()], [
+            new NotNull(groups: ['Default']),
+            new \ArrayObject(),
+        ]);
+    }
+
     public function testValidCantBeNested()
     {
         $this->expectException(ConstraintDefinitionException::class);
@@ -163,4 +220,10 @@ public function testValidCantBeNested()
             new Valid(),
         ]);
     }
+
+    public function testValidCantBeNestedInAnotherNested()
+    {
+        $this->expectException(ConstraintDefinitionException::class);
+        new ConcreteComposite([new NotNull()], [new Valid()]);
+    }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/Fixtures/WhenTestWithAttributes.php b/src/Symfony/Component/Validator/Tests/Constraints/Fixtures/WhenTestWithAttributes.php
index a683eb3c67940..31258dc0d192d 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/Fixtures/WhenTestWithAttributes.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/Fixtures/WhenTestWithAttributes.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\Validator\Tests\Constraints\Fixtures;
 
 use Symfony\Component\Validator\Constraints\Callback;
+use Symfony\Component\Validator\Constraints\Length;
 use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Constraints\NotNull;
 use Symfony\Component\Validator\Constraints\When;
@@ -36,6 +37,9 @@ class WhenTestWithAttributes
     #[When(expression: 'true', constraints: new NotNull(), groups: ['foo'])]
     private $qux;
 
+    #[When(expression: 'true', constraints: new NotNull(), otherwise: new Length(exactly: 10), groups: ['foo'])]
+    private $quux;
+
     #[When(expression: 'true', constraints: [
         new NotNull(),
         new NotBlank(),
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/WhenTest.php b/src/Symfony/Component/Validator/Tests/Constraints/WhenTest.php
index fa71de02e85d5..6516a10148080 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/WhenTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/WhenTest.php
@@ -13,6 +13,7 @@
 
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\Validator\Constraints\Callback;
+use Symfony\Component\Validator\Constraints\Length;
 use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Constraints\NotNull;
 use Symfony\Component\Validator\Constraints\When;
@@ -59,6 +60,7 @@ public function testAttributes()
                 groups: ['Default', 'WhenTestWithAttributes'],
             ),
         ], $classConstraint->constraints);
+        self::assertEmpty($classConstraint->otherwise);
 
         [$fooConstraint] = $metadata->properties['foo']->getConstraints();
 
@@ -68,6 +70,7 @@ public function testAttributes()
             new NotNull(groups: ['Default', 'WhenTestWithAttributes']),
             new NotBlank(groups: ['Default', 'WhenTestWithAttributes']),
         ], $fooConstraint->constraints);
+        self::assertEmpty($fooConstraint->otherwise);
         self::assertSame(['Default', 'WhenTestWithAttributes'], $fooConstraint->groups);
 
         [$barConstraint] = $metadata->properties['bar']->getConstraints();
@@ -78,6 +81,7 @@ public function testAttributes()
             new NotNull(groups: ['foo']),
             new NotBlank(groups: ['foo']),
         ], $barConstraint->constraints);
+        self::assertEmpty($barConstraint->otherwise);
         self::assertSame(['foo'], $barConstraint->groups);
 
         [$quxConstraint] = $metadata->properties['qux']->getConstraints();
@@ -85,6 +89,7 @@ public function testAttributes()
         self::assertInstanceOf(When::class, $quxConstraint);
         self::assertSame('true', $quxConstraint->expression);
         self::assertEquals([new NotNull(groups: ['foo'])], $quxConstraint->constraints);
+        self::assertEmpty($quxConstraint->otherwise);
         self::assertSame(['foo'], $quxConstraint->groups);
 
         [$bazConstraint] = $metadata->getters['baz']->getConstraints();
@@ -95,6 +100,15 @@ public function testAttributes()
             new NotNull(groups: ['Default', 'WhenTestWithAttributes']),
             new NotBlank(groups: ['Default', 'WhenTestWithAttributes']),
         ], $bazConstraint->constraints);
+        self::assertEmpty($bazConstraint->otherwise);
         self::assertSame(['Default', 'WhenTestWithAttributes'], $bazConstraint->groups);
+
+        [$quuxConstraint] = $metadata->properties['quux']->getConstraints();
+
+        self::assertInstanceOf(When::class, $quuxConstraint);
+        self::assertSame('true', $quuxConstraint->expression);
+        self::assertEquals([new NotNull(groups: ['foo'])], $quuxConstraint->constraints);
+        self::assertEquals([new Length(exactly: 10, groups: ['foo'])], $quuxConstraint->otherwise);
+        self::assertSame(['foo'], $quuxConstraint->groups);
     }
 }
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/WhenValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/WhenValidatorTest.php
index 019ec828f4aac..501398d2a53a9 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/WhenValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/WhenValidatorTest.php
@@ -13,6 +13,7 @@
 
 use Symfony\Component\Validator\Constraints\Blank;
 use Symfony\Component\Validator\Constraints\Callback;
+use Symfony\Component\Validator\Constraints\Length;
 use Symfony\Component\Validator\Constraints\NegativeOrZero;
 use Symfony\Component\Validator\Constraints\NotBlank;
 use Symfony\Component\Validator\Constraints\NotNull;
@@ -50,6 +51,20 @@ public function testConstraintIsExecuted()
         ));
     }
 
+    public function testOtherwiseIsExecutedWhenFalse()
+    {
+        $constraint = new NotNull();
+        $otherwise = new Length(exactly: 10);
+
+        $this->expectValidateValue(0, 'Foo', [$otherwise]);
+
+        $this->validator->validate('Foo', new When(
+            expression: 'false',
+            constraints: $constraint,
+            otherwise: $otherwise,
+        ));
+    }
+
     public function testConstraintsAreExecutedWithNull()
     {
         $constraints = [
@@ -159,6 +174,21 @@ public function testConstraintsNotExecuted()
         $this->assertNoViolation();
     }
 
+    public function testOtherwiseIsExecutedWhenTrue()
+    {
+        $constraints = [new NotNull()];
+
+        $this->expectValidateValue(0, '', $constraints);
+
+        $this->validator->validate('', new When(
+            expression: 'true',
+            constraints: $constraints,
+            otherwise: new Length(exactly: 10),
+        ));
+
+        $this->assertNoViolation();
+    }
+
     public function testConstraintsNotExecutedWithObject()
     {
         $number = new \stdClass();