A journalist wants to make a film about the life and death of Claretta Petacci, the mistress of Benito Mussolini. For this, she will turn to her sister Miriam.
| Actor | Role |
|---|---|
 Claudia CardinaleMiriam Petacci | Miriam Petacci |
 Giuliano GemmaMarcello Petacci | Marcello Petacci |
 Caterina BorattoGiuseppina Petacci | Giuseppina Petacci |
| FFernando BriamoBenito Mussolini | Benito Mussolini |
 Nancy BrilliYoung Miriam Petacci | Young Miriam Petacci |
| RRaffaele CuriCarabinieri Lieutenant | Carabinieri Lieutenant |
| SSasha D'ArcMusician | Musician |