Gaspard Ulliel as Louis

Nathalie Baye as Martine

Vincent Cassel as Antoine

Marion Cotillard as Catherine

Léa Seydoux as Suzanne

Antoine Desrochers as Pierre Jolicoeur

William Boyce Blanchette as Louis (age 15)

Sasha Samar as Taxi Driver

Arthur Couillard as Little Boy on the Airplane

Patricia Tulasne as Air Hostess

Emile Rondeau as Louis (age 5-6)

Théodore Pellerin as Antoine (age 16-22)

Jenyane Provencher as Young Girl on the Trampoline

Stephan Dubeau as Father