Bored with her bourgeois life, the young Maria Variani, daughter of a professor, meets Bruno, who is part of an amateur jazz group, and allows herself to be persuaded to join the band that plays during the radio program "The microphone is yours".
| Actor | Role |
|---|---|
 Gisella SofioMaria Variani | Maria Variani |
 Aroldo TieriFilippo | Filippo |
| EEnrico LuziBruno | Bruno |
 Ada DondiniZia Camilla | Zia Camilla |
 Enrico ViarisioCommendator Michele Variani | Commendator Michele Variani |
| GGuglielmo IngleseCommissario Venditi | Commissario Venditi |
| MMario SilettiImpresario italo americano | Impresario italo americano |
| FFranco PucciLeone Kovich, imitatore | Leone Kovich, imitatore |
| FFranco ParentiAnacleto, gasista | Anacleto, gasista |
| RRino Salviatihimself | himself |
| GGorni Kramerhimself | himself |
 Nunzio Filogamohimself | himself |
| GGisella MonaldiMimì, la candida | Mimì, la candida |
 Nilla Pizziherself | herself |