Louis Diamond Phillips (born Upchurch; February 17, 1962) is an American actor. His breakthrough came when he starred as Ritchie Valens in the biographical drama film La Bamba (1987). For Stand and Deliver (1988), Phillips was nominated for a Golden Globe Award and won an Independent Spirit Award.

Richard Steven Valenzuela, better known by his stage name Ritchie Valens, was an American guitarist, singer and songwriter. A rock and roll pioneer and a forefather of the Chicano rock movement, Valens died in a plane crash just eight months after his breakthrough.