Mon meilleur ami

Daniel Auteuil

François Coste

Dany Boon

Bruno Bouley

Julie Gayet

Catherine, François's partner

Julie Durand

Louise Coste, François's daughter

Henri Garcin

Étienne Delamotte, producer

Jacques Mathou

Mr. Bouley, Bruno's father

Marie Pillet

Mrs. Bouley, Bruno's mother

Élisabeth Bourgine

Julia

Jacques Spiesser

Letellier

Audrey Marnay

Marianne, Catherine's companion