Which Actress Is Fattening Up for New Role?

When it comes to landing a role in movie, celebs have no problem doing whatever it takes to look the part. But one thing you don't see everyday is Hollywood's leading ladies plumping up for their roles, considering how much effort they put into looking trim and fit. So can you guess which actress is putting vanity aside for a role in the new film French Women Don't Get Fat (based on the bestselling book)? Hint: She won an Oscar for a role that had working out like a mad woman.