Chris Hemsworth is unrecognizable after loosing 500-calorie a day diet for new movie

The Holloywood actor, 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.