Malcolm-Jamal Warner, best known for playing Theo Huxtable on NBC’s The Cosby Show, has died. He was 54. The actor and director died Sunday in an accidental drowning off the coast of Costa Rica, according to ABC News, with the Costa Rican National Police noting that Warner died from asphyxia.

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Malcolm-Jamal Warner’s “Cosby Show” family is mourning his death. Warner died at age 54 on Sunday, July 20, after drowning near a beach in Limón, Costa Rica. The actor was best known for playing Theodore Huxtable on all eight seasons of “The Cosby Show,” which aired from 1984-1992.