J.B. Smoove is is an American actor, writer, comedian and voice actor. He started his career off with the television series Def Comedy Jam in 1995. He plays Leon on the HBO series Curb Your Enthusiasm. He also starred on the CBS sitcom The Millers from 2013 to 2015. He portrayed a fictionalized version of himself on the BET improv-comedy reality television parody Real Husbands of Hollywood.