Natalie Portman

Natalie won an Oscar for her role in 'Black Swan' but lost a great deal of weight and found the experience "more difficult" than anything she had ever done before. She said: "I was barely eating, I was working 16 hours a day. I was almost method acting without intending to. I do wonder now how people can do this kind of role when they have a family. It was more difficult than anything I’ve ever experienced before. I like to go home and be myself, but with this one I didn’t get the chance. It didn’t leave me."