For fun and to dazzle his wife, the novelist Morgan steals a ring and gets rid of it in the costume jewelry section of a supermarket. Sophie buys the diamond, which forces the novelist to embark on crazy adventures to recover the jewel.
| Actor | Role |
|---|---|
 René DaryClive Morgan | Clive Morgan |
 Suzy CarrierSophie | Sophie |
 Noëlle NormanPhyllis | Phyllis |
 Jean ParédèsCharles | Charles |
 Jean TissierPresident | President |
 Raymond PellegrinTony | Tony |
 Marcelle MonthilMademoiselle Pomme | Mademoiselle Pomme |
 Jacques DynamGeorges | Georges |
| KKetty KervielÉléonore | Éléonore |
 Charles LemontierLawyer | Lawyer |
 Jean TouloutWilliam | William |
 Albert DinanJim | Jim |
| GGaby BruyèreNot listed | Not listed |
 Jean CarmetGuest | Guest |
| RRené CharlesNot listed | Not listed |
 Lucien DesagneauxNot listed | Not listed |
 Émile DrainJeweler | Jeweler |
| CCharlotte EcardDeaf | Deaf |
| CClaudette FalcoMaid | Maid |
| PPierre HaussNot listed | Not listed |
 Jacques HenleySimson | Simson |
 HenneryPublisher | Publisher |
 Gaëtan JorIinspector | Iinspector |
| MMarcel LestanCommissioner | Commissioner |
 Simone LogeartNot listed | Not listed |
 Julien MaffreGardener | Gardener |
| MMarcel MeralNot listed | Not listed |
 Michel NastorgNot listed | Not listed |
 Gaston OrbalCommander | Commander |
| RRené PascalNot listed | Not listed |