Barbara Steele

Helen Karnstein / Mary Karnstein

George Ardisson

Baron Kurt Hummel

Halina Zalewska

Elizabeth Hummel / Adele Karnstein

Umberto Raho

Von Klage

Laura Nucci

Grumalda

Giuliano Raffaelli

Count Humboldt

Nello Pazzafini

Monk

Jeffrey Darcey

The Messenger

Aldo Barozzi

Plague Victim (uncredited)

Mario Casella

Gorca (uncredited)

Severino D'Ottavi

Party Guest (uncredited)

Alba Maiolini

Wife of Plague Victim (uncredited)

Aldo Massasso

The Priest (uncredited)

Enzo Mondino

Villager at the Execution (uncredited)

Piero Pastore

Baron Von Letz (uncredited)

Sylvia Sorrente

Gorca's Wife (uncredited)

Terry Velasco

Gorca's Daughter (uncredited)