Gérard Philipe
le marquis Fabrice Del Dong
Renée Faure
Clelia Conti
María Casares
la duchesse Gina de San Severina
Louis Salou
le prince Ernest IV
Louis Seigner
Grillo - le gardien de la Tour Farnese
Tullio Carminati
Le comte Mosca, le premier ministre
Lucien Coëdel
Rassi, le chef de la police (as Lucien Coedel)
Aldo Silvani
Le général Conti, gouverneur de la prison de Parme
Maria Michi
Marietta
Claudio Gora
Le marquis Crescenzi
Mario Gallina
L'aubergiste
Albert Rémy
Nerio Bernardi
La mari de Fausta (uncredited)
Renato Chiantoni
Le soldat a la lettre anonyme (uncredited)
Emilio Cigoli
(uncredited)
Attilio Dottesio
Ferrante Palla (uncredited)
Claudio Ermelli
L'espion de Mosca (uncredited)
Enrico Glori
Gilletti, l'acteur de théâtre (uncredited)
Walter Grant
(uncredited)
Cosetta Greco
(uncredited)
Tina Lattanzi
La princesse Marie-Louise de Bourbon-Parme (uncredited)
Achille Majeroni
L'évêque (uncredited)
Lina Marengo
Una signora curiosa (uncredited)
Enzo Musumeci Greco
(uncredited)
Evelina Paoli
La grande duchesse (uncredited)
Fernand Rauzéna
(uncredited)
Laura Redi
Fausta (uncredited)
Dina Romano
Manamaccia (uncredited)
Michele Sakara
(uncredited)
Jone Salinas
(uncredited)
Ermete Tamberlani
Le prêtre (uncredited)