Gérard Philipe as le marquis Fabrice Del Dong

Renée Faure as Clelia Conti

María Casares as la duchesse Gina de San Severina

Louis Salou as le prince Ernest IV

Louis Seigner as Grillo - le gardien de la Tour Farnese

Tullio Carminati as Le comte Mosca, le premier ministre

Lucien Coëdel as Rassi, le chef de la police (as Lucien Coedel)

Aldo Silvani as Le général Conti, gouverneur de la prison de Parme

Maria Michi as Marietta

Claudio Gora as Le marquis Crescenzi

Mario Gallina as L'aubergiste

Albert Rémy as

Nerio Bernardi as La mari de Fausta (uncredited)

Renato Chiantoni as Le soldat a la lettre anonyme (uncredited)

Emilio Cigoli as (uncredited)

Attilio Dottesio as Ferrante Palla (uncredited)

Claudio Ermelli as L'espion de Mosca (uncredited)

Enrico Glori as Gilletti, l'acteur de théâtre (uncredited)

Walter Grant as (uncredited)

Cosetta Greco as (uncredited)

Tina Lattanzi as La princesse Marie-Louise de Bourbon-Parme (uncredited)

Achille Majeroni as L'évêque (uncredited)

Lina Marengo as Una signora curiosa (uncredited)

Enzo Musumeci Greco as (uncredited)

Evelina Paoli as La grande duchesse (uncredited)

Fernand Rauzéna as (uncredited)

Laura Redi as Fausta (uncredited)

Dina Romano as Manamaccia (uncredited)

Michele Sakara as (uncredited)

Jone Salinas as (uncredited)

Ermete Tamberlani as Le prêtre (uncredited)