Eric Elmosnino as Serge Gainsbourg

Lucy Gordon as Jane Birkin

Laetitia Casta as Brigitte Bardot

Doug Jones as La gueule

Anna Mouglalis as Juliette Greco

Mylène Jampanoï as Bambou

Sara Forestier as France Gall

Kacey Mottet Klein as Lucien Ginsburg

Răzvan Vasilescu as Joseph Gainsburg (le père)

Dinara Drukarova as Olga Gainsburg (la mère)

Philippe Katerine as Boris Vian

Deborah Grall as Elisabeth Levizky

Yolande Moreau as Fréhel

Ophélia Kolb as Le Modèle

Claude Chabrol as Le Producteur Musique de Gainsbourg

François Morel as Le Directeur de l'Internat

Philippe Duquesne as Lucky Sarcelles

Oliver Cywie as Gosse Internat 1