JB Smoove, is an American actor, writer, and stand-up comedian who began his TV career on Russell Simmons’s Def Comedy Jam in the early 1990s. He is best known for his recurring role as Leon on the HBO series Curb Your Enthusiasm. J. B. joined the Season 2 cast of the Fox sitcom ‘Til Death in 2008, and was promoted to main cast for Season 3. He currently portrays a fictionalized version of himself on the BET comedy-improv reality television parody Real Husbands of Hollywood, and also stars on the CBS sitcom The Millers.