3/9
Andrew Shawaf, PacificCoastNews.com
People magazine's former Sexiest Man Alive, Matt Damon, sacrificed his Bourne Identity brawn to play Mark Whitacre in this year's The Informant.
"It was very, very fun—probably the funnest time I had working because I didn't have to go to the gym after work and I just ate everything I could see," the 39-year-old has said about gaining girth.