José Garcia as Arthur Seligman

Marion Cotillard as Isabelle/Alice

Michel Duchaussoy as le père d'Arthur

Bernard Le Coq as Walcott / Granger

Marilou Berry as Réceptionniste Hopital

Héléna Noguerra as Soraya

Alexandre Donders as Le patron du café

Arnaud Maillard as Le petit ami de Koskas

Dominique Bettenfeld as Policier 1

Gérald Laroche as Koskas

Hugo Brunswick as Yvan Seligman (ado)

Lise Lamétrie as La gardienne

Marisa Borini as Mme Seligman, la mère d'Arthur

Nathalie Nell as Dr. Brenner

Pascal Bongard as Clovis