Malcolm-Jamal Warner's life left a profound impact on those around him -- something "The Breakfast Club" can attest to ... the late 'Cosby Show' actor was their current studio's first guest!!!

Actor Malcolm-Jamal Warner, best known for playing Theo Huxtable on "The Cosby Show," has died. TMZ and the Associated Press have reported that Warner died due to an accidental drowning while vacationing in Costa Rica. Warner was swimming at Playa Cocles in Limon province when a current pulled him deeper into the ocean.

Malcolm-Jamal Warner, best known for his role as Theo Huxtable on The Cosby Show, has died at the age of 54 following a drowning incident, according to TMZ.