Keith Farrelle Cozart (born August 15, 1995), known professionally as Chief Keef, is an American rapper and record producer. He emerged from Chicago's South Side and gained early attention in the early 2010s through a series of mixtapes that drew regional acclaim. He is widely credited with popularizing the drill subgenre of hip hop and is considered one of its foundational figures.

Chief Keef's breakthrough came with his fifth mixtape, "Back from the Dead" (2012), which featured the single "I Don't Like" with Lil Reese.