Most of the time being a Hollywood actor is all about the glitz and the glamour, but occasionally actors have to go that extra mile to transform themselves for a role. Take a look at some of the most dramatic actor transformations ever seen on film.
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Lionsgate
Carey showed off her acting chops in "Precious," appearing with little make-up and letting the movie's talented behind-the-scenes artists make her nearly unrecognizable as a dowdy welfare caseworker.