George O'Malley is a fictional character from the medical drama television series Grey's Anatomy, which airs on the American Broadcasting Company in the United States. The character was created by series producer Shonda Rhimes, and was portrayed by actor T. R. Knight from 2005 to 2009. Introduced as a surgical intern at the fictional Seattle Grace Hospital, O'Malley worked his way up to resident level, while his relationships with his colleagues Meredith Grey, Cristina Yang, Izzie Stevens and Alex Karev formed a focal point of the series. O'Malley married and divorced Callie Torres, and also entertained romantic correlations with Meredith, Izzie Stevens, and Olivia Harper. Knight auditioned for the show, expecting a one-season run. In 2007, Knight's co-star Isaiah Washington insulted him with a homophobic slur, which resulted in the termination of Washington's Grey's Anatomy contract. In 2009, after the conclusion of the fifth season, it was confirmed that Knight would not be returning for the show's sixth season.