Catherine Elizabeth "Cat" Deeley (born 23 October 1976) is an English disc jockey, television personality and former fashion model. Her first television appearance was in 1994 as a model on the daytime show Kilroy. Since 2006, she began hosting the second season of American reality show So You Think You Can Dance, replacing Lauren Sanchez, who was pregnant at the time. In January 2008, a new series of So You Think You Can Dance started its auditions, with Deeley again hosting. As a result of her ambition to break into Hollywood, Deeley's long term relationship with PR Executive Mark Whelan broke down.