Dany Boon as Valentin Duquesne, aka Valentin D.

Line Renaud as Suzanne Duquesne, Valentin's mother

Laurence Arné as Constance Brandt, wife of Valentin

Valérie Bonneton as Louloute, Valentin's ex-fiancée

Guy Lecluyse as Gustave, Valentin's brother

François Berléand as Alexander, Constance's father

Pierre Richard as Joseph Duquesne, Valentine's father

Juliane Lepoureau as Britney

Stéphane Pezerat as Speech therapist

Aladin Reibel as Professor Rosenberg

Thomas VDB as Paparazzi

Dan Cohen as Fernando Alvarez

Judi Beecher as Kate Fischer

Antonia de Rendinger as Madame de Cléry

Ludovic Pinette as Alexander's lawyer

Ludmila Mikhailova as Olga

Slimane Majdi as Receptionist

Clémence Beauxis as Receptionist

Silvie Laguna as Baroness

Yan Tual as Security agent

Claudia Tagbo as Minister of Culture

Nathalie Blanc as Journalist Palais de Tokyo

Pierre Buf as Cashier Station A1

Jean-Pascal Abribat as Accounting

Gaetano Laury as Cashier Station A1

Karina Orr as Galerist

Nicolas White as Vassili

Vincent Primault as Professor Legard

Jeanfi Janssens as Tony

Hugues Boucher as Staid guest

Françoise Thuries as Lady

Véronique Gallet as Lady

Jean-Noël Martin as Guest

Patrick Brossard as Staid guest

Julie Schotsmans as Employee

Kad Merad as Kad Merad

Julia Vignali as Julia Vignali

Arthur as Arthur

Pascal Obispo as Pascal Obispo

Claire Chazal as Claire Chazal

Mathieu Cayrou as Self

Anaelle Delouya as Sofitel employee

Claire Guillon as

Oleg Eyben as Guest (uncredited)

Sandy Lobry as Employee (uncredited)