Check out these remarkable movie makeunders
Usually an avid runner, she famously packed on the pounds -- upwards of 40! -- to embody the neurotic, overweight British Everywoman in Bridget Jones' Diary (2001) and Bridget Jones: The Edge of Reason (2004). "Emotionally, it doesn't affect me," she has said of gaining the weight.
Credit: Universal/Courtesy Everett Collection