39. Malcolm-Jamal Warner (Age 54)

Malcolm-Jamal Warner played Theo Huxtable on The Cosby Show from age 13, becoming a beloved TV son to millions. He continued acting in shows like Malcolm & Eddie and The Resident.
Malcolm tragically passed away at 54 in an accidental drowning while vacationing in Costa Rica. His long career and kind spirit left a lasting impression on generations of viewers.