Hollywood actress Sienna Miller will never change her diet for a film role, insisting she needs to eat properly to keep her energy up if she is to work so hard. The 25-year-old plays Andy Warhol's muse EDIE SEDGEWICK in biopic FACTORY GIRL - and was told to lose weight for the part. But, despite persistence from director George Hickenlooper, the British beauty is unwilling to sacrifice her love of food for the camera. She says, "Edie was skinnier than I am, so director George Hickenlooper wanted me to lose weight. But I can't work that hard and not eat. He'd come and try to snatch bagels out of my hands."