Ewa Aulin

Candy Christian

Charles Aznavour

Hunchback juggler

Marlon Brando

Grindl

Richard Burton

MacPhisto

James Coburn

Dr. A.B. Krankheit

John Huston

Dr. Arnold Dunlap

Walter Matthau

Gen. R.A. Smight

Ringo Starr

Emmanuel

John Astin

T.M. Christian / Jack Christian

Elsa Martinelli

Livia

Sugar Ray Robinson

Zero

Anita Pallenberg

Nurse Bullock

Lea Padovani

Silvia Fontegliulo

Florinda Bolkan

Lolita

Marilù Tolo

Marquita

Umberto Orsini

The Big Guy

Enrico Maria Salerno

Jonathan J. John

Nicoletta Machiavelli

Marquita

Enzo Fiermonte

Al Pappone

Joey Forman

The Cop

Micaela Pignatelli

Girl

Christian Marquand

Film Director (uncredited)

Buck Henry

Mental Patient (uncredited)

Judith Malina

Woman (uncredited)

Julian Beck

Hippie (uncredited)

Romano Targa

Max (uncredited)

International Velvet

Extra