Malcolm-Jamal Warner has died at the age of 54. The actor was in Costa Rica on a family vacation and drowned while swimming. The actor played the only son of Bill Cosby's character, Heathcliff Huxtable, in the sitcom from 1984 to 1992. He and Eddie Griffin led the sitcom Malcolm & Eddie from 1996 to 2000, and Warner was also well known for his role as Alex Reed on Reed Between the Lines, which he starred in alongside Tracee Ellis Ross from 2011 to 2015.