Celebs Who Got Fit (or Didn't) 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!

The Twilight Kids

Maybe those night owls who hit the gym when everyone's asleep are really vampires? Taylor Lautner had to gain an impressive 30 pounds of muscle for his role in the Twilight series, but he's not the only one in the cast who had to go through a lifestyle transformation. Ashley Greene has said she did cardio, planks, and kettlebells to get "extremely fit," and Kristen Stewart said she was "trying to not put so much butter on her food" to get in shape for the latest installment.

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Carrie