Romain Duris as Xavier Rousseau

Kelly Reilly as Wendy

Audrey Tautou as Martine

Cécile de France as Isabelle

Kevin Bishop as William

Olivier Saladin as Gérard

Zinedine Soualem as M. Boubaker

Evguenya Obraztsova as Natacha

Irene Montalà as Neus

Pierre Gérald as Grand-père

Frédérique Bel as Barbara

Cédric Klapisch as L'homme qui veut aller aux toilettes dans le train (uncredited)

Aïssa Maïga as Kassia

Gary Love as Edward

Lucy Gordon as Celia Shelburn

Martine Demaret as Mère Xavier

Pierre Cassignard as Platane

Hélène Médigue as Madame Vanpeteguem

Carole Franck as Productrice TV

Robert Plagnol as Auteur Série

Nicolas Briançon as Directeur Série

Bernard Haller as Michel Hermann - Editeur

Cristina Brondo as Soledad

Federico D'Anna as Alessandro

Barnaby Metschurat as Tobias

Christian Pagh as Lars

Lannick Gautry as Snowboarder

Julien Guéris as Jean-Édouard

Laura Weissbecker as Odile

Sophie Barbe as Caroline - Copine Isa 1

Julie Durand as Juliette - Copine Isa 2

Catherine Lebegue as Copine 'Cogneuse'

Florence d'Azémar as Copine Fête Isabelle

Fatiha Cheriguene as Nounou Grand-père

Marie-Renée George as Concierge Xavier

Igor Gusev as Père Natacha

Yelena Solovyova as Mère Natacha

Aleksandr Karpukhov as Frère Natacha

Nicholas Day as Père William

Amanda Boxer as Mère William

Julien Hans di Capua as Copain Celia Moscou

Jake Canuso as Miguel

Senia Devine as Traductrice Russe

Katrina Vasilieva as Chorégraphe Russe

Julien Pabion as Mac Master

Agathe Robilliard as Journaliste 'Prune'

Annette Faure as Journaliste Cosmo

Anne Steffens as Copine Xavier 1

Stéphanie Ricco as Copine Xavier 2

Isabelle Joly as Copine Xavier 3

Amin Djakliou as Lucas

Amanda Jane Manning as Danceuse de ballet (uncredited)

Stéphanie Montreux as Danceuse de ballet (uncredited)

Philippe Soucy as Livreur (uncredited)

Eléonore Stern as La Fille de la Gare (uncredited)