Malcolm-Jamal Warner Jason LaVeris/FilmMagic Share on Facebook Share on X Share to Flipboard Send an Email Show additional share options Share on LinkedIn Share on Pinterest Share on Reddit Share on Tumblr Share on Whats App Print the Article Post a Comment Malcolm-Jamal Warner, best known for playing Theo Huxtable on The Cosby Show comedy, has died. He was 54. The veteran actor and director died from an accidental drowning off the coast of Costa Rica on Sunday, according to ABC News, with the Costa Rican National Police telling the news site Warner's official cause of death was asphyxia.