Josephine and Iris, sisters with opposite personalities, have their relationship radically transformed while working on a book.
| Actor | Role |
|---|---|
 Emmanuelle BéartIris Dupin | Iris Dupin |
 Julie DepardieuJoséphine Cortes | Joséphine Cortes |
 Patrick BruelPhilippe Dupin | Philippe Dupin |
 Alice IsaazHortense | Hortense |
 Jacques WeberMarcel Grobz | Marcel Grobz |
 Karole RocherJosiane Lambert | Josiane Lambert |
 Édith ScobHenriette | Henriette |
 Samuel Le BihanAntoine Cortes | Antoine Cortes |
 Quim GutiérrezLuca | Luca |
 Alexandra GentilIris (étudiante) | Iris (étudiante) |
 Alysson ParadisMylène | Mylène |
 Ariel WizmanGaston Serrurier | Gaston Serrurier |