William Lawrence "Bill" Allen is an American film and television actor.
Allen was born in Wichita, Kansas. He became famous for his role in the 1986 film Rad as BMX racer Cru Jones. Among other roles, William appeared as Roger Sloate in the 1987 Family Ties television episode "Matchmaker". Bill has toured extensively for the band The Pipefitters with his harmonica, alongside actor Lou Diamond Phillips.