| Peter Sellers |
Robert Danvers |
| Goldie Hawn |
Marion |
| Tony Britton |
Andrew Hunter |
| Nicky Henson |
Jimmy |
| Diana Dors |
John's Wife |
| Judy Campbell |
Lady Heather |
| John Comer |
John, the Porter |
| Gabrielle Drake |
Julia Halforde-Smythe |
| Nicola Pagett |
Clare, the Bride |
| Geraldine Sherman |
Caroline |
| Thorley Walters |
Manager of Carlton Hotel |
| Ruth Trouncer |
Gilly Hunter |
| Francoise Pascal |
Paola, the Au Pair |
| Tom Marshall |
Bryan |
| Raf De La Torre |
Mr. Le Guestier |
| Constantin de Goguel (as Constantin De Goguel) |
Michel Le Guestier |
| Avril Angers |
English Tourist in Lift |
| Georges Lambert |
Floor Waiter |
| Marianne Stone |
Woman Reporter at London Airport |
| Margaret Lacey |
Autograph Hunter at Wedding |
| Christopher Cazenove |
Nigel |
| Robin Parkinson |
1st Reporter |
| Roy Skelton |
2nd Reporter |
| Carolyn Seymour |
Nigel's Girlfriend |
| André Charise |
Concierge |
| John Serret |
Lift Attendant |
| Lance Percival |
Willie, the Groom |
| Mark Dignam |
Wedding Reception Guest |
| Eric Barker |
Wedding Reception Guest |
| Pearl Hackney |
Wedding Reception Guest |