* Jean Dujardin as Octave Parango
* Audrey Tautou as Manon
* José Garcia as Antoine
* Gilles Lellouche as Boris
* Anne Marivin as Florence
* François-Xavier Demaison as Paul
The film also features a supporting cast including:
* Serge Merlin as Fabrice
* Laurent Stocker as Bernard
* Patrick Mille as Alain
* Valérie Bonneton as Sophie
* Lionel Abelanski as the Chef
* Mélissa Désormeaux-Poulin as the "Star"
* Ludivine Sagnier as herself (cameo)
* Jean-Paul Rouve as himself (cameo)