France, 1809. Captain Neuville is called to the front, leaving his future bride heartbroken. Her sister decides to write letters on his behalf to cheer her up.

Jean Dujardin
as Captain Charles-Grégoire Neuville

Mélanie Laurent
as Elisabeth Beaugrand

Christophe Montenez
as Nicolas Bonvallet

Fabienne Galula
as Eugénie

Noémie Merlant
as Pauline

Féodor Atkine
as General Mortier-Duplessis

Evelyne Buyle
as Madame Beaugrand

Aurélie Boquien
as Madame Dunoyer

Christian Bujeau
as Monsieur Beaugrand

Laurent Bateau
as Monsieur Dunoyer