With her father on trial, 15-year-old Mignon leaves Paris to stay with her Italian relatives. The rather prim, snooty teen at first struggles to fit in with the more earthy Forbicioni family, each with their own problems. Eventually she bonds with her lovestruck little cousin Giorgio—who'll learn important life lessons over the course of his summer with Mignon.
| Actor | Role |
|---|---|
 Stefania SandrelliLaura Forbicioni | Laura Forbicioni |
 Jean-Pierre DuriezFederico Forbicioni | Federico Forbicioni |
 Leonardo RutaGiorgio Forbicioni | Giorgio Forbicioni |
 Céline BeauvalletMignon | Mignon |
 Massimo DapportoAldo | Aldo |
 Micheline PresleProf. Girelli | Prof. Girelli |
 Francesca AntonelliChiara Forbicioni | Chiara Forbicioni |
| LLorenzo De PasquaCacio | Cacio |
| EEleonora SambiagioAntonella Forbicioni | Antonella Forbicioni |
| DDaniele ZaccariaTommaso Forbicioni | Tommaso Forbicioni |
 Valentina CerviValentina | Valentina |
| GGiulio MarcelloPennellone | Pennellone |
| AAlessandro MarcheiNot listed | Not listed |
| DDaniela MorelliNot listed | Not listed |
 Marina TagliaferriNot listed | Not listed |
 Francesca ArchibugiGiornalista che intervista Giorgio fuori dal cinema (uncredited) | Giornalista che intervista Giorgio fuori dal cinema (uncredited) |
| RRoberto BeriniMassimo (uncredited) | Massimo (uncredited) |
| FFlavio ChiappaloneGiacomino Forbicioni (uncredited) | Giacomino Forbicioni (uncredited) |
| GGiuseppe GiordaniGiuseppe Girelli (uncredited) | Giuseppe Girelli (uncredited) |