Now, Hemsworth has shared a photo of just how radical his transformation was.

“Just tried a new diet/training program called ‘Lost at Sea,'” Hemsworthwrote on Twitter.

“Wouldn’t recommend it.”

Image

Credit: twitter.com/chrishemsworth

Hemsworth talked to EW earlier this summer about the grueling effort that went into losing so much weight.

“Every pound feels like a kilogram.”

“They had to work out every day, even on shooting days,” director Ron Howardtold EW.

“Because they had to lose the weight pretty fast and they had to lose it safely.

In the Heart of the Seaopens Dec. 11.