Actors Who Went Through Extreme Body Transformation For a Role

Jared Leto, Chapter 27

The lengths to which Leto went for his latest role might seem just a tad extreme. To play John Lennon's assassin, Mark David Chapman, in J.P. Schaefer's film, "Chapter 27," Leto packed 67 pounds onto his lanky frame to better approximate the killer's doughy physique. By the end of filming, the extra weight had taken such a toll that he could no longer walk to the set. It's easily his most dramatic transformation to date.