A mischievous, adventuresome fourteen-year-old girl and her best friend begin following an eccentric concert pianist around New York City after she develops a crush on him.
| Actor | Role |
|---|---|
 Peter SellersHenry Orient | Henry Orient |
 Tippy WalkerValarie Campbell Boyd | Valarie Campbell Boyd |
 Merrie SpaethMarian 'Gil' Gilbert | Marian 'Gil' Gilbert |
 Paula PrentissStella Dunnworthy | Stella Dunnworthy |
 Angela LansburyIsabel Boyd | Isabel Boyd |
 Tom BosleyFrank Boyd | Frank Boyd |
 Phyllis ThaxterMrs. Avis Gilbert | Mrs. Avis Gilbert |
 Bibi OsterwaldErica 'Boothy' Booth | Erica 'Boothy' Booth |
 John FiedlerSidney | Sidney |
 Fred StewartDoctor | Doctor |
 Al LewisStore Owner | Store Owner |
 Peter DuchinJoe Daniels | Joe Daniels |
 Philippa BevansEmma Hambler | Emma Hambler |
| JJerry Jarrett(as Jerry Jerrett) | (as Jerry Jerrett) |
| JJane BuchananLillian Kafritz | Lillian Kafritz |
| PPeter TurgeonOrchestra Member | Orchestra Member |
 William HinnantNot listed | Not listed |
| CColin RomoffNot listed | Not listed |
| WWilliam LeMassena(as William Le Massena) | (as William Le Massena) |
 Claudia MorganDrunk Woman at Christmas Party | Drunk Woman at Christmas Party |