United Kingdom, May 20 -- Nicholas Galitzine was eating 5,000 calories a day for his He-Man transformation.

The 31-year-old actor is playing the iconic superhero in new movie Masters of the Universe, and he has opened up about the gruelling process he went through to earn his ripped physique.

Reflecting on the fitness regime, he told E! News: "It was an every day a week thing. It was a pretty short amount of time.

"You kind of would love to live in this character for a year beforehand but the training very much changed as the movie went on...

"We started out really trying to pack on as much size as possible. You know, having up to 5,000 calories sometimes, weightlifting for three hours a day and then we streamlined it."

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