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Updated: Fri, 11 Jul 2014 15:00:00 GMT
Movie stars who've lost and gained weight for roles

Jared Leto

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To film biopic Chapter 27, Jared Leto put on nearly five stone for his role as Mark Chapman - the deranged fan who assassinated John Lennon. The drastic change to his diet left him with some health concerns: “Really, it's a stupid thing to do. I got gout, and my cholesterol went up so fast in such a short time.”