Colin Kelly Jost (, born June 29, 1982) is an American comedian, actor, and writer. He is known for his work on Saturday Night Live, where he has served as a writer since 2005 and "Weekend Update" co-anchor since 2014. He also served as one of the show's co-head writers from 2012 to 2015, and it was announced that he would come back as one of the show's head writers in December 2017.