16. Bradley Cooper
Cooper enjoyed a steady career of TV series and movies until he made a name for himself in bigger movies like Wedding Crashers, and The Hangover. For the most part, he’d played fast talking bad guys or funny men, but we knew he had more in him. So did producers. When Cooper landed the role of Chris Kyle in the movie American Sniper, he had to transform his body to play a totally different kind of character. He packed on 40 pounds by increasing his intake and lifting weights. Cooper has since lost that weight.