Colin Kelly Jost (/ˈdʒoʊst/; born June 29, 1982) is an American comedian, actor, and writer. Jost has been a writer for the NBC sketch comedy series Saturday Night Live since 2005, and co-anchor of Weekend Update since 2014. He also served as one of the show's co-head writers from 2012 to 2015 and later came back as one of the show's head writers in 2017 until 2022 alongside Michael Che.
Colin Jost was born and raised in New York City in the Grymes Hill neighborhood of Staten Island, the elder of two sons. His mother, Kerry J. Kelly, was the chief medical officer for the New York City Fire Department, and his father, Daniel A. Jost, is a former teacher at Staten Island Technical High School. He has one younger brother, Casey Jost, a writer and a producer of Impractical Jokers; he also had a role in Staten Island Summer.
Raised Roman Catholic, he attended Regis High School in Manhattan, where he was the editor of the school newspaper The Owl. He attended Harvard University, majoring in history and literature, with a focus on Russian literature and British literature, and wrote his senior thesis on Vladimir Nabokov. Jost graduated cum laude from Harvard in 2004.

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