Celebrities Who've Lost or Gained Weight For Movies

Actors never shy away from transforming for a part, both offscreen and on, and their personal fitness routine is no exception. Sometimes the role of a lifetime comes with the requirement that a celeb start downing doughnuts or spending hours at the gym. Or on the barre, as Black Swan's Natalie Portman and Mila Kunis have been telling us. Click through for more celebs who changed up their fitness routines for upcoming movies!