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.

Charles Goldner

Dr. Franz Anton Mesmer

Lee Kresel

King Louis XVI / Innkeeper

Robert Atkins

King Louis XV

Nicholas Bruce

De Remy

Franco Corsaro

Chico

Annielo Mele

Joseph Balsamo as a Child

Ronald Adam

Court President

Bruce Belfrage

Crown Prosecutor

Alexander Danaroff

Dr. Duval / Baron von Minden

Leonardo Scavino

Gaston / Beniamino Balsamo (as Leon Lenoir)

Tamara Shayne

Maria Balsamo

Joop van Hulzen

Minister of Justice

Peter Trent

Dr. Mesmer's Friend

Giuseppe Varni

Boehmer

Tatyana Pavlova

Grieving Mother

Harriet Medin

(uncredited)

Valentino Bruchi

(uncredited)

Ludmilla Dudarova

(uncredited)

Rosina Galli

(uncredited)

Silvana Mangano

(uncredited)

Filippo Minelli

(uncredited)

Michele Sakara

(uncredited)

Nicholas Soussanin

(uncredited)

Milly Vitale

(uncredited)

Orson Welles

Director

Gregory Ratoff

Director

Charles Bennett

Guión, Guión Adaptado

Richard Schayer

Guión, Guión Adaptado

Alejandro Dumas

Novela

Alexandre Dumas

Novela

Anchise Brizzi

Director de Fotografía

Otello Martelli

Director de Fotografía

Ubaldo Arata

Director de Fotografía

Paul Sawtell

Compositor de la Música Original, Música

Gregory Ratoff

Productor

Edward Small Productions

Compañía de Produccion

United Artists

Compañía de Produccion

Dario Sabatello

Productor Asociado

Edward Small

Productor Ejecutivo

Don L. Cash

Maquilladora

Georges Annenkov

Diseño de Vestuario

Vittorio Nino Novarese

Diseño de Vestuario

James C. McKay

Editor

Fred R. Feitshans Jr.

Editor

Renzo Lucidi

Editor

Jean d'Eaubonne

Dirección Artística

Ottavio Scotti

Dirección Artística

Gino Brosio

Decorados