Malcolm-Jamal Warner, who played Theo Huxtable on “The Cosby Show,” died at 54.

Malcolm-Jamal Warner the actor who played teenage son Theo Huxtable on “The Cosby Show,” has died at age 54 in an accidental drowning in Costa Rica, authorities there said.

Warner kept his personal life private and didn't share the name of his daughter, but often spoke about being a proud father