Bill Cosby
Fat Albert / Bill / Mushmouth / Mudfoot Brown (voice)
Kim Hamilton
Marge Franklin / Nurse (voice)
Julius Harris
Mr. Tyrone (voice)
Jan Crawford
Russell (voice)
Gerald Edwards
Weird Harold (voice)
Eric Suter
Rudy (voice)
Erika Scheimer
Diesel (voice)
Eric Greene
Marshall Franklin (voice)
Ty Henderson
Ray Franklin (voice)