<Ul> <Li> Lou Diamond Phillips as Ritchie Valens </Li> <Li> Esai Morales as Roberto "Bob" Morales (Ritchie's half - brother) </Li> <Li> Rosanna DeSoto as Connie Valenzuela (Ritchie's mother) </Li> <Li> Danielle von Zerneck as Donna Ludwig </Li> <Li> Elizabeth Peña as Rosie Morales </Li> <Li> Joe Pantoliano as Bob Keane </Li> <Li> Rick Dees as Ted Quillin </Li> <Li> Marshall Crenshaw as Buddy Holly </Li> <Li> Howard Huntsberry as Jackie Wilson </Li> <Li> Brian Setzer as Eddie Cochran </Li> <Li> Stephen Lee as The Big Bopper </Li> <Li> Sam Anderson as Mr. Ludwig (Donna's father) </Li> </Ul> <Li> Lou Diamond Phillips as Ritchie Valens </Li> <Li> Esai Morales as Roberto "Bob" Morales (Ritchie's half - brother) </Li> <Li> Rosanna DeSoto as Connie Valenzuela (Ritchie's mother) </Li>

Who played richie's brother in la bamba