• 
  Walter Matthau

  Gen. R.A. Smight
• 
  Marlon Brando

  Grindl
• 
  Fabian Dean

  Sergent de poliţie
• 
  John Huston

  Dr. Arnold Dunlap
• 
  Ewa Aulin

  Candy Christian
• 
  Enrico Maria Salerno

  Jonathan J. John
• 
  Richard Burton

  MacPhisto
• 
  Marilù Tolo

  Conchita

• 
  James Coburn

  Dr. A.B. Krankheit
• 
  Florinda Bolkan

  Lolita
• 
  Umberto Orsini

  The Big Guy
• 
  Christian Marquand

  Film director
• 
  Buck Henry

  Mental patient
• 
  Charles Aznavour

  Hunchback juggler
• 
  Lea Padovani

  Silvia Fontegliulo

• 
  Elsa Martinelli

  Livia
• 
  Anita Pallenberg

  Nurse Bullock
• 
  John Astin

  T.M. Christian/Jack Christian
• 
  Ringo Starr

  Emmanuel
• 
  Joey Forman

  Charlie - the Cop
• 
  Sugar Ray Robinson

  Zero