Cast
Bruce Belfrage
Crown Prosecutor
Peter Trent
Dr. Mesmer's Friend
Nancy Guild
Marie Antoinette / Lorenza
Valentina Cortese
Zoraida
Raymond Burr
Alexandre Dumas, Jr.
Gregory Gaye
Chambord / Monk (as Gregory Gay)
Ronald Adam
Court President
Silvana Mangano
(uncredited)
Orson Welles
Joseph Balsamo aka Count Cagliostro
Akim Tamiroff
Gitano
Frank Latimore
Gilbert de Rezel
Margot Grahame
Mme. du Barry
Stephen Bekassy
Viscount de Montagne
Leonardo Scavino
Gaston / Beniamino Balsamo (as Leon Lenoir)
Ludmilla Dudarova
(uncredited)
Rosina Galli
(uncredited)
Tamara Shayne
Maria Balsamo
Tatyana Pavlova
Grieving Mother
Harriet Medin
(uncredited)
Milly Vitale
(uncredited)
Berry Kroeger
Alexandre Dumas, Sr.
Robert Atkins
King Louis XV