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 as

Yves Gladine as

Hubert Noël as Michel Dolgorouki

Gabrielle Dorziat as

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)