Don Preston
— Self (AKA Dom DeWilde) / Biff Debris / Uncle Meat
Frank Zappa
— Self / The Imaginary Director
Phyllis Smith Altenhaus
— Self / Sheba Flieschman (as Phyllis Altenhaus)
Dick Barber
— Self
Massimo Bassoli
— Adult Minnesota Tishman
Rodney Bingenheimer
— Self
Jimmy Carl Black
— Self
Aynsley Dunbar
— Self / Biff Junior
Roy Estrada
— Self
Francesca Fisher
— The Countess
Bunk Gardner
— Self
Buzz Gardner
— Self
Lowell George
— Self
Dick Kunc
— Self
Manfred Lerch
— Self
C. Mercedes Lewis
— Girl Who Was A Sofa
Sal Lombardo
— Self
Meredith Monk
— Red Face Girl
Billy Mundi
— Rollo
Janet Neville-Ferguson
— Self / Market Clerk
Lucy Offerall
— Self / Market Clerk (as Miss Lucy)
Fritz Rau
— Self
Linda Ronstadt
— Self
Carl Schenkel
— Self
Cal Schenkel
— Self
Stumuk
— Elderly Biff Debris
Arthur Dyer Tripp III
— Self
Ian Underwood
— Self
Haskell Wexler
— Self
Tom Wilson
— Self