Burgundy 1728. Old count Antoine d'Eon is overjoyed. His daughter-in-law has finally given birth to a boy and he will at long last be able to transmit his inheritance to his son Pascal. At least this is what he thinks, for Pascal has concealed from his father the fact that his son was ... a daughter, his eighth daughter! Well, enough is enough and Geneviève has no other choice but become a boy first, then a soldier and even the special envoy of Louis XV, King of France, to Catherine II, the Czarina of Russia.
Andrée Debar
as Geneviève d'Éon / Charles, chevalier d'Éon, agent secret au service du Roi
Bernard Blier
as le baron d'Exter, le chef des espions à la solde des Prussiens
Dany Robin
as la comtesse De Monval, l'envoyée spéciale du Roi Louis XV
Gabriele Ferzetti
as Bernard Turquet de Mayenne
Isa Miranda
as la tsarine Elisabeth Petrovana de Russie
Jean Desailly
as le Roi Louis XV
Simone Valère
as la marquise de Pompadour
Jacques Castelot
as le marquis de L'Hospital, l'ambassadeur de France en Russie
Gisèle Grandpré
as Blanche d'Éon de Beaumont
Bernard Lajarrige
as Pascal d'Éon de Beaumont
