Trailer
Images
 | Romy Schneider as Katia |
 | Curd Jürgens as Czar Alexander II |
 | Pierre Blanchar as Koubaroff |
 | Antoine Balpêtré as Kilbatchich |
 | Françoise Brion as Sophie |
 | Monique Mélinand as Tsarina Maria |
 | Michel Bouquet as Bibesco |
 | Bernard Dhéran as Stéphane Ryssakov |
 | Margo Lion as Institut Supervisor |
 | Jacqueline Marbaux as Mlle Trépeau |
 | Yves Barsacq as Katourine |
 | Alain Saury as Soloviev |
 | Senta Berger as Court Lady |
 | Hans Unterkircher as Paskievitch |
 | Marcel d'Orval |
| Yves Gladine |
 | Hubert Noël as Michel Dolgorouki |
 | Gabrielle Dorziat |
| Liliane Chenevière as (uncredited) |
| Danièle Dali as (uncredited) |
 | Germaine Delbat as (uncredited) |
 | Françoise Deldick as (uncredited) |
| Helene Lauterböck as (uncredited) |
 | Robert Le Béal as (uncredited) |
 | Jacques Mancier as (uncredited) |
 | Paul Mercey as (uncredited) |
 | Pierre Moncorbier as (uncredited) |
| Sophie Poncin as (uncredited) |
 | László Szabó as (uncredited) |
| Victor Tabournot as (uncredited) |
 | Monique Tarbès as (uncredited) |
 | Irène Tunc as (uncredited) |
 | Egon von Jordan as (uncredited) |
| Directing | |
| Robert Siodmak | Director |
Writing | |
| Charles Spaak | Writer |
| Marthe Bibesco | Novel |
| Georges Neveux | Writer |
Sound | |
| Joseph Kosma | Original Music Composer |
Production | |
| Michel Safra | Producer |
Editing | |
| Henri Taverna | Editor |
| Louisette Hautecœur | Editor |
Camera | |
| Michel Kelber | Director of Photography |
Costume & Make-Up | |
| Rosine Delamare | Costume Design |
Art | |
| Jean d'Eaubonne | Art Direction |
