Actor and director Malcolm-Jamal Warner, best known for his role on "The Cosby Show," has died in an accidental drowning in Costa Rica, where he was vacationing with his family, officials there said. He was 54.

Malcolm-Jamal Warner's cause of death has been released by police. The actor, who is best known for his role as Theo Huxtable in the hit TV sitcom "The Cosby Show," died on Sunday off the coast of Costa Rica after a drowning, Costa Rican National Police told ABC News. He was 54.