Actors and actresses who went to insane lengths to transform themselves.

9. Charlize Theron gained 30 pounds for “Monster” and then dropped it right afterrnrnTheron ate nothing but junk food in preparation for her role. “I first began stuffing myself with Krispy Kreme doughnuts, but after a while I got sick of them,” Theron said. “I love potato chips, so that was a good thing for me. I’m a salty girl so I had my secret stash with me of potato chips at all times.” She went on to win best actress for her role.