 Frank ZappaMember of Mothers of Invention (uncredited) | Member of Mothers of Invention (uncredited) |
| MMark VolmanMember of Mothers of Invention | Member of Mothers of Invention |
| HHoward KaylanMember of Mothers of Invention | Member of Mothers of Invention |
| IIan UnderwoodMember of Mothers of Invention | Member of Mothers of Invention |
| AAynsley DunbarMember of Mothers of Invention | Member of Mothers of Invention |
 George DukeMember of Mothers of Invention | Member of Mothers of Invention |
 Theodore BikelRance Muhammitz / Dave | Rance Muhammitz / Dave |
 Keith MoonHot Nun | Hot Nun |
 Ringo StarrLarry the Dwarf / Frank Zappa | Larry the Dwarf / Frank Zappa |
| JJanet Neville-FergusonGroupie #1 (Janet Ferguson) | Groupie #1 (Janet Ferguson) |
| LLucy OfferallGroupie #2 (Lucy) | Groupie #2 (Lucy) |
| JJimmy Carl BlackLonesome Cowboy Burt | Lonesome Cowboy Burt |
| MMartin LickertJeff | Jeff |
| DDick BarberBif Debris - The Vacuum Cleaner | Bif Debris - The Vacuum Cleaner |
| DDon PrestonDon | Don |
| PPamela Des BarresInterviewer (as Pamela Miller) | Interviewer (as Pamela Miller) |
| RRuth UnderwoodFake Drummer | Fake Drummer |
| JJudy GridleyChorus Leader | Chorus Leader |
| JJim PonsMember of Mothers of Invention (uncredited) | Member of Mothers of Invention (uncredited) |
| EEuclid James 'Motorhead' SherwoodMotorhead Sherwood (uncredited) | Motorhead Sherwood (uncredited) |
