The members of the Popinot family of French champagne tycoons suspect that the widowed head of the family Charles Popinot is keeping a mistress in Rome and generally living a wild life. Unbeknownst to them he has happily re-married and had a son with a much younger woman. She believes he is twenty years younger than he really is and is shocked when his relatives including his mother, grown-up sons and granddaughter arrive in Italy.
| Actor | Role |
|---|---|
 Seymour HicksCharles Popinot | Charles Popinot |
 Claire LuceNina Popinot | Nina Popinot |
 Eva MooreJosephine Popinot | Josephine Popinot |
 Judy GunnBlanche Popinot | Blanche Popinot |
 Miles MallesonHenri Popinot | Henri Popinot |
 Kynaston ReevesBenedict Popinot | Benedict Popinot |
 Michael ShepleyRichard Emsley | Richard Emsley |
 A. Bromley DavenportPierre | Pierre |
| AAmy Brandon ThomasStephanie Popinot | Stephanie Popinot |
| BBrian BuchelNot listed | Not listed |
 Andreas MalandrinosGatekeeper | Gatekeeper |
| MMary Hayley BellNot listed | Not listed |
| SStella MantovaniNot listed | Not listed |
| SSonia SomersNot listed | Not listed |
| TTony De LungoNot listed | Not listed |
| EEnrico MuzioNot listed | Not listed |
| KKathleen WestonNot listed | Not listed |