Barbara Steele as Harriet Montebruno / Belinda

Anthony Steffen as Roberto Merigi

Claudio Gora as Conte Montebruno

Mario Brega as Carlo Lionesi

Marina Berti as Ilda, the Housekeeper

Ursula Davis as Rita

Vassili Karis as Dario, the Teacher

Aldo Berti as Vittorio, the Gardener

Betty Delon as Barbara Lionesi

Antonio Corevi as Guglielmo, the Majordomo

Antonio Acqua as Sergente, the Guardian

Livia Rossetti as Natalia

Halina Zalewska as Luisa

Giovanna Lenzi as Maria

Bruno Ariè as Man in Tavern (uncredited)

Alba Maiolini as Mother of Natalia (uncredited)

Emilio Messina as Villager Attacking Vittorio (uncredited)

Giulio Mauroni as Villager Attacking Vittorio (uncredited)

Rocco Lerro as Villager Attacking Vittorio (uncredited)

Ottorino Polentini as Friend of Lionesi in Tavern (uncredited)