On screen
Cast
34 credited performers
Orson Welles
Joseph Balsamo aka Count Cagliostro
Nancy Guild
Marie Antoinette / Lorenza
Akim Tamiroff
Gitano
Frank Latimore
Gilbert de Rezel
Valentina Cortese
Zoraida
Margot Grahame
Mme. du Barry
Stephen Bekassy
Viscount de Montagne
Berry Kroeger
Alexandre Dumas, Sr.
Gregory Gaye
Chambord / Monk (as Gregory Gay)
Raymond Burr
Alexandre Dumas, Jr.
Artwork unavailable
Charles Goldner
Dr. Franz Anton Mesmer
Artwork unavailable
Lee Kresel
King Louis XVI / Innkeeper
Robert Atkins
King Louis XV
Artwork unavailable
Nicholas Bruce
De Remy
Artwork unavailable
Franco Corsaro
Chico
Artwork unavailable
Annielo Mele
Joseph Balsamo as a Child
Ronald Adam
Court President
Bruce Belfrage
Crown Prosecutor
Artwork unavailable
Alexander Danaroff
Dr. Duval / Baron von Minden
Leonardo Scavino
Gaston / Beniamino Balsamo (as Leon Lenoir)
Tamara Shayne
Maria Balsamo
Artwork unavailable
Joop van Hulzen
Minister of Justice
Peter Trent
Dr. Mesmer's Friend
Artwork unavailable
Giuseppe Varni
Boehmer
Tatyana Pavlova
Grieving Mother
Harriet Medin
(uncredited)
Artwork unavailable
Valentino Bruchi
(uncredited)
Ludmilla Dudarova
(uncredited)
Rosina Galli
(uncredited)
Silvana Mangano
(uncredited)
Artwork unavailable
Filippo Minelli
(uncredited)
Artwork unavailable
Michele Sakara
(uncredited)
Artwork unavailable
Nicholas Soussanin
(uncredited)
Milly Vitale
(uncredited)