- Lando Buzzanca
- Rosario Trapanese
- Pamela Tiffin
- Karen
- Renzo Marignano
- Gustav Larsen
- Gigi Ballista
- Commendatore Silvio Borellon
- Rita Forzano
- Ilse the Accountant
- Steffen Zacharias
- Bosen
- Dominique Boschero
- Priscilla
- Alessandro Figurelli
- Professor Rudersdorf
- Victoria Zinny
- Luisa
- Donatella Della Nora
- Annelise Jørgensen
- Ada Pometti
- Liliane
- Ferdy Mayne
- Professor Grutekoor
- Kjeld Nørgaard
- Carl Gunner
- Edda Ferronao
- Zeigler
- Matilde Antonelli
- Charlotte
- Ennio Majani
- (as Ennio Maiani)
- Dante Calisi
- Hotel Concierge
- Else-Marie
- Karen's Mother
- Paul Kerner
- Karen's Father
- Nino Terzo
- Customer at Sex Shop
- Gastone Pescucci
- Valerio
- Antonio Anelli
- Pipe Smoker
- Torben Bille
- Hot Dog Vendor
- Sisto Brunetti
- Airplane Passenger
- Ulla Johannsen
- Ulla
- Silvio Klein
- Bar Customer
- Elaine Olcott
- Misunderstanding Party Guest
- Stefania Possamai
- Spin the Bottle Player
- Elizabeth Turner
- Eva Grete / Elizabeth, Medicine Student (uncredited)
- Mira Vidotto
- Film Studio Attendant
