'I wouldn't recommend it!' Gaunt Chris Hemsworth is unrecognizable after grueling 500-calorie a day diet for new movie

By Sarah Jones For Dailymail.com

Published: 18:49 EST, 22 November 2015 | Updated: 01:16 EST, 23 November 2015

He has won a legion of fans with his attractive muscular physique.

But Avengers star Chris Hemsworth, 32, looked shockingly gaunt in an Instagram selfie on sunday after embarking on an intense 500-calorie a day diet ahead of his new film. 

'Just tried a new diet/training program called "Lost At Sea." Wouldn't recommend it,' Hemsworth wrote, after slimming down for In the Heart of the Sea.

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Skin and bones! 'Just tried a new diet/training program called "Lost At Sea." Wouldn't recommend it,' Hemsworth captioned in a selfie he posted on Sunday as he was forced to slim down for his new film, In the Heart of the Sea

Skin and bones! 'Just tried a new diet/training program called "Lost At Sea." Wouldn't recommend it,' Hemsworth captioned in a selfie he posted on Sunday as he was forced to slim down for his new film, In the Heart of the Sea

His more usual look: Chris showing off his muscular physique back in 2012

His more usual look: Chris showing off his muscular physique back in 2012

Donning a bushy beard and disheveled mane the Hollywood A-lister channeled his inner Tom Hanks from Cast Away.

Hemsworth's rib cage and bones were clearly protruding in the photo.

The normally athletic actor's rib cage and bones were clearly protruding in the photo.

'I spend more time thinking about food than anything else,' he told Entertainment Tonight.

'We have to shoot the really skinny stuff where we drop down to 5, 6, 700 calories a day, a good three or four weeks and it's going to be pretty uncomfortable, but we'll be together in our misery,' he revealed in the interview.

Moby Dick movie: The Australian heartthrob plays Owen Chase in the film, a sailor stranded at sea with the other crew for 90 days as they struggle to overpower the massive beast before the killer whale destructs their ship, killing many on-board

Moby Dick movie: The Australian heartthrob plays Owen Chase in the film, a sailor stranded at sea with the other crew for 90 days as they struggle to overpower the massive beast before the killer whale destructs their ship, killing many on-board

The Australian heartthrob plays Owen Chase in the Moby Dick inspired film.

His character is a sailor stranded at sea with the other crew for 90 days as they struggle to overpower the massive beast before the killer whale destructs their ship, killing many on-board.

The average amount of calories recommended for a man per day depends on his size and activity levels, but it's somewhere between 2000-3000. 

Hungry Hemsworth! 'I spend more time thinking about food than anything else,' he told Entertainment Tonight, pictured with his wife, Elsa Pataky

Hungry Hemsworth! 'I spend more time thinking about food than anything else,' he told Entertainment Tonight, pictured with his wife, Elsa Pataky

Earlier this month the Huntsman: Winter's War actor spoke of his sailing fodder on Jimmy Kimmel Live.

'You go to bed hungry. And then you have a fasting period of 15 hours and then you have little meals through the day.'

In the Heart Of The Sea hits US theaters on December 11. 

Hemsworth channels Hanks! Donning a bushy beard and disheveled mane the Hollywood A-lister channeled his inner Tom Hanks from Cast Away

Hemsworth channels Hanks! Donning a bushy beard and disheveled mane the Hollywood A-lister channeled his inner Tom Hanks from Cast Away

 

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