Some stars go to great lengths to get into character. Matthew McConaughey, Anne Hathaway, Renee Zellweger, and Christian Bale are just a few of the many celebrities who've lost or gained significant amounts of weight for movies
Anne Hathaway in Les Miserables
The star, who nabbed a Best Supporting Actress Oscar for her role in Tom Hooper's 2012 adaptation of the Broadway musical, famously lost 25 pounds (10 before shooting, 15 during) to play tuberculosis-afflicted prostitute Fantine. "I had to be obsessive about it -- the idea was to look near death," she later said of her diet, which consisted of two squares of dried oatmeal paste a day. "Looking back on the whole experience -- and I don't judge it in any way -- it was definitely a little nuts."