Chris Hemsworth has just arrived in Sydney after a trip to Fiji.
The Hollywood superstar arrived at the airport in style, having travelled home in a private jet.
The Aussie actor was accompanied by his older brother, Luke, 43, and Luke's wife Samantha.
The group had visited the tropical paradise to celebrate the 40th birthday of Chris' best mate and longtime personal trainer, Luke Zocchi.
The 40-year-old superstar showed off his rippling arm muscles in a black tank top paired with black trousers.
He had on a cap, and looked engaged as he made a phone call while waiting outside the terminal.
The brothers were also accompanied on the trip by their parents, Leonie and Craig Hemsworth.
Chris had paid tribute to trainer Zocchi in a photo posted to Instagram on Monday.
Chris Hemsworth (pictured) has just arrived in Sydney after a trip to Fiji. The Hollywood superstar arrived at the airport in style, having travelled home in a private jet
The actor also posted a throwback image, showing his more lithe form back when the two men were still boys.
The new photo showed how much they had grown into men - and built up impressive muscles along the way.
'Happy 40th birthday to one of my best mates @zocobodypro. You're one of a kind brother,' Chris wrote in the caption alongside the image.
Zocchi, who lives near the Hemsworth clan in Byron Bay, helps the superstar and his wife Elsa Pataky work on their physiques for blockbuster roles.
Speaking exclusively to FEMAIL, Luke said that weight lifting is key for those wanting to lose weight as well as build muscle.
The 40-year-old superstar showed off his rippling arm muscles in a black tank top paired with black trousers
The Aussie actor was accompanied by his older brother, Luke (pictured)
Luke's wife Samantha (pictured) came along, as did their parents, Leonie and Craig Hemsworth
Luke also shared that Elsa, 48, used the same program Chris followed for his new blockbuster, Thor: Love & Thunder, to get in shape for her role as the very ripped Captain J.J. Collins in Interceptor - which left her in 'the best shape of her life.'
Both Elsa and Chris used the Power program - designed by Luke - on Chris' fitness app Centr.
To build up your biceps to look similar to the God of Thunder, Luke recommends working on your upper body for the first four to six weeks you of a new training regime.
'Keeping weights manageable for you and reps on the lower side of things,' he says.
'Then I would move to challenge yourself a little more and more each week - upping the intensity of the weights you are using and increasing reps from 6-8 to to 8-12.
'I would focus on two sessions of 'push' movements and two sessions of 'pull' movements to make sure you are hitting all the different muscles you are targeting.
Chris had paid tribute to trainer Zocchi (left) in a photo posted to Instagram on Monday
