Chris Hemsworth was weak on set of In the Heart of the Sea

Chris Hemsworth felt like he was going to  »pass out » when he was shooting his new movie ‘In the Heart of the Sea.’

The 31-year-old actor was forced to follow an extremely low-calorie diet for his role as shipwrecked sailor Owen Chase in the sea-set drama and has admitted the consequences of starving himself left him feeling light-headed and unwell.

Speaking on Australia’s ‘Kyle and Jackie O Show,’ he said:  »We felt as if we were going to pass out any second. »

The handsome star – who is known for his bulging biceps and ripped abs, especially when playing superhero Thor – called on Tom Hanks to ask him for some advice on how to drop the weight following his role in 2000’s ‘Cast Away.’

He explained:  »We called up Tom Hanks and he gave us some advice on how to lose the weight. »

Jackie ‘O’ Henderson asked:  »So, what is the trick? »

Hemsworth replied:  »Don’t eat. Pretty straight-forward. »

The hunk lost 33lbs by the end of filming and he believes the starvation he experienced helped him get into character.

Jackie said:  »When you’re that food deprived and cranky, does it help with doing a film where you’re essentially lost at sea and you wouldn’t be in the best of moods? »

Hemsworth hit back:  »It does. Looking back, it was essential to doing the story justice. It was based on true events which inspired Moby Dick to be written. There wasn’t a lot of acting required for those last couple of weeks. »

Meanwhile, earlier this week, Hemsworth uploaded a photograph of his shrunken figure on his Instagram account.

‘In the Heart of the Sea’ – directed by Ron Howard and based on a true event that happened in 1820 – is set for release across the US on December 11.