Guillaume Canet as Gustave Klopp

Zabou Breitman as Paméla

Guillaume Gallienne as Samuel Pupkin

François Berléand as Guy Bennet

Jean-Pierre Cassel as Le père de Gus

Vincent Rottiers as Kevin

Léa Drucker as La jumelle patineuse

Gilles Lellouche as Le jumeau patineur

Jean-Noël Brouté as Le docteur 70's

Lionel Abelanski as Le directeur du supermarché

Philippe Lefebvre as Le prof de gym

Laurent Lafitte as L'animateur show karaté

Mélanie Doutey as La fille moitié des choses

Anne Marivin as La femme aux objets

Benoît Poelvoorde as Lenny Barr

Delphine Benattard as L'amie fille "moitié des choses"

Smadi Wolfman as La secrétaire de Bennet

Diane Kruger as La fille du night club

Eglantine Rembauville-Nicolle as Pam ado

Philippe Lellouche as Hervé

François Levantal as Le père des jumeaux

Xavier Claudon as L'homme aux roux

Alexis Tomassian as L'homme qui hurle

Marc Citti as Le flic 1

Thomas Jouannet as Le flic 2

Sinclair as L'ami fille moitié des choses

Jean-Claude Van Damme as Jean-Claude Van Damme fantasmé par Lenny