
Orson Welles
Joseph Balsamo aka Count Cagliostro
Directing

Nancy Guild
Marie Antoinette / Lorenza
Acting

Akim Tamiroff
Gitano
Acting

Frank Latimore
Gilbert de Rezel
Acting

Valentina Cortese
Zoraida
Acting

Margot Grahame
Mme. du Barry
Acting

Stephen Bekassy
Viscount de Montagne
Acting

Berry Kroeger
Alexandre Dumas, Sr.
Acting

Gregory Gaye
Chambord / Monk (as Gregory Gay)
Acting

Raymond Burr
Alexandre Dumas, Jr.
Acting

Charles Goldner
Dr. Franz Anton Mesmer
Acting
![Lee Kresel]()
Lee Kresel
King Louis XVI / Innkeeper
Acting
![Robert Atkins]()
Robert Atkins
King Louis XV
Acting
![Nicholas Bruce]()
Nicholas Bruce
De Remy
Acting
![Franco Corsaro]()
Franco Corsaro
Chico
Acting
![Annielo Mele]()
Annielo Mele
Joseph Balsamo as a Child
Acting

Ronald Adam
Court President
Acting

Bruce Belfrage
Crown Prosecutor
Acting
![Alexander Danaroff]()
Alexander Danaroff
Dr. Duval / Baron von Minden
Acting

Leonardo Scavino
Gaston / Beniamino Balsamo (as Leon Lenoir)
Acting

Tamara Shayne
Maria Balsamo
Acting
![Joop van Hulzen]()
Joop van Hulzen
Minister of Justice
Acting
![Peter Trent]()
Peter Trent
Dr. Mesmer's Friend
Acting
![Giuseppe Varni]()
Giuseppe Varni
Boehmer
Acting

Tatyana Pavlova
Grieving Mother
Acting

Harriet Medin
(uncredited)
Acting
![Valentino Bruchi]()
Valentino Bruchi
(uncredited)
Acting

Ludmilla Dudarova
(uncredited)
Acting

Rosina Galli
(uncredited)
Acting

Silvana Mangano
(uncredited)
Acting
![Filippo Minelli]()
Filippo Minelli
(uncredited)
Acting
![Michele Sakara]()
Michele Sakara
(uncredited)
Acting

Nicholas Soussanin
(uncredited)
Acting

Milly Vitale
(uncredited)
Acting