Cumbuka also appeared in numerous films. He appeared as former NBA guard Oscar Robertson in the biodrama pic Maurie (1973) about the life of Maurice Stokes. In Harlem Nights (1989), he plays the toothless drunk gambler who gets shot over money. Other films include Change of Habit with Elvis Presley (1969), Blacula (1972), Trader Horn (1973), Lost in the Stars (1974), Mandingo (1975), Dr. Black, Mr. Hyde (1976), Bound for Glory (1976), The Jericho Mile (1979), Doin' Time (1985), Brewster's Millions (1985), Volunteers (1985), Out of Bounds (1986), Moving (1988) and Caged in Paradiso (1990), as well as appearances in other films.