Chris Hemsworth isn't a stranger to taking extreme measures to prepare for his roles, but this one seems to take the cake.
During a stop on "Jimmy Kimmel Live!," the Aussie heartthrob admitted that he's been on a crash diet in anticipation for his next film, "Heart of the Sea."
In the forthcoming flick, the 30-year-old actor plays a sailor who is stranded at sea.
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"['Heart of the Sea'] is the true events that inspired Herman Melville to write Moby Dick," he explained to Jimmy Kimmel.
"A bunch of sailors in a whaling ship get struck by a whale, the ship sinks and they jump onto the small rafts and drift for 90 days. And basically they begin to die and eat each other...a romantic comedy," he said laughing, "And we have to get rather skinny. So we're on 500 or 600 calories a day."
Yes, you read that correctly.
The one-time buff Thor actor is taking drastic steps to completely transform his physique.
"I had a cheat meal a couple of minutes ago so I'm in a good mood. [I had] a bit of pizza. Like 10 [slices]," Hemsworth explained on the show, "But that's just once a week and then you feel really guilty."
Hemsworth has the rest of the cast to commiserate with over the strict new diet.
"It's funny, you've never heard 15 big, burly guys playing sailors talk about their calorie count, what they should and shouldn't eat, what their cheat meal is going to be," he shared.
And it seems like the program is quite difficult for the movie star.
"I mean, you can consume 600 calories in a milkshake. So it ends up being a couple of small salads, a couple of small pieces of protein and that's kind of it and you go to bed hungry," he admitted.
"Then you have like a fasting period of 15 hours, like you stop eating completely, and then you have little meals through the day."
That does not sound like fun.