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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DreamWorks/Paramount Image
Whereas his "Tropic Thunder" character, Aussie method actor Kirk Lazarus, underwent a surgical "pigmentation alteration" to become a black man for a movie role.