Christian Bale's 'The Fighter' weight loss and six more drastic actor transformations

Yo-yo dieting is a way of life for some, but for these seven actors, gaining and losing lots of weight is part of the job.

Christian Bale's thin frame in "The Fighter" still does not compare to his 62-pound weight loss for "The Machinest."
(Image credit: Paramount Pictures)

Christian Bale's performance in the new boxing film, The Fighter, is already generating Oscar buzz. The actor dramatically "transformed" himself from Batman buff to "rail thin" for his role as drug addict and former boxer Dicky Eklund. (Watch the trailer for The Fighter.) It's certainly not the first time Bale, and others in Hollywood, have suffered for their art. Here are six notable instances:

Natalie Portman, Black Swan (2010)

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