Annette Stroyberg
— Carmilla
Mel Ferrer
— Leopoldo De Karnstein
Elsa Martinelli
— Georgia Monteverdi
Alberto Bonucci
— Carlo Ruggieri
René-Jean Chauffard
— Dr. Verari
Gabriella Farinon
— Lisa
Serge Marquand
— Giuseppe
Edith Peters
— The Cook
Nathalie Lafaurie
— Marie
Carmilla Stroyberg
— Martha
Marc Allégret
— Judge Monteverdi
Renato Speziali
— Guido Naldi (uncredited)
Giovanni Di Benedetto
— Police Marshal (uncredited)
Roger Vadim
— Passenger in the Plane (uncredited)