Frank Zappa
Guitar, Keyboards, Vocals
Jimmy Carl Black
Drums, Percussion
George Duke
Keyboards, Vocals
Aynsley Dunbar
Guitar
Howard Kaylan
Vocals
Michael Lickert
Bass
Jim Pons
Bass, Vocals
Ian Underwood
Guitar, Keyboards, Wind
Ruth Underwood
Keyboards, Percussion
Mark Volman
Vocals
Top Score Singers - David Van Asch - Conductor
Vocals
Phyllis Bryn-Julson
Soprano
The Royal Philharmonic Orchestra - Elgar Howarth - Conductor
Classical Guitar Ensemble - John Williams - Supervisor
Additional Cast:
Theodore Bikel as Rance Muhammitz, the narrator/Master of Ceremonies
Ringo Starr as Larry the Dwarf, dressed as Frank Zappa
Keith Moon as the hot nun
Jimmy Carl Black as Lonesome Cowboy Burt
Euclid James 'Motorhead' Sherwood also as Larry Fanoga and the fake Lucy
Pamela Des Barres as the interviewer
Martin Lickert as Jeff
Janet Neville-Ferguson as Groupie #1
Lucy Offerall as Groupie #2
Dick Barber as Chunga – The Industrial Vacuum Cleaner
Judy Gridley as the chorus leader
London Philharmonic Orchestra as the bewildered orchestra
Mark Volman also as the voice of the Good Conscience
Howard Kaylan also as the voice of Jeff, the cartoon
Don Preston also as The Monster
Jim Pons as voice of the Bad Conscience