Katherine Marie Heigl born November 24, 1978) is an American actress and producer. She is possibly best known for her role as Dr. Izzie Stevens on ABC's Grey's Anatomy from 2005 to 2010, for which she won a Primetime Emmy Award for Outstanding Supporting Actress – Drama Series in 2007. She has also starred in films such as Knocked Up, Zyzzyx Road, 27 Dresses, The Ugly Truth, Killers, Life As We Know It, New Year's Eve, and One for the Money.