 Julie ChristieDiana Scott | Diana Scott |
 Dirk BogardeRobert Gold | Robert Gold |
 Laurence HarveyMiles Brand | Miles Brand |
 José Luis de VilallongaPrince Cesare della Romita | Prince Cesare della Romita |
 Roland CurramMalcolm | Malcolm |
 Basil HensonAlec Prosser-Jones | Alec Prosser-Jones |
 Dante PosaniGino | Gino |
 Umberto RahoSignor Palucci | Signor Palucci |
 Alex ScottSean Martin | Sean Martin |
 Brian WildeBasil Willett | Basil Willett |
| PPeter BaylissLord Alex Grant | Lord Alex Grant |
 T.R. BowenTony Bridges (as Trevor Bowen) | Tony Bridges (as Trevor Bowen) |
 Georgina CooksonCarlotta Hale | Carlotta Hale |
 James CossinsMr. Basildon | Mr. Basildon |
 Helen LindsayFelicity Prosser-Jones | Felicity Prosser-Jones |
 Carlo PalmucciCurzio della Romita | Curzio della Romita |
| EErnest WalderKurt | Kurt |
| PPauline YatesEstelle Gold | Estelle Gold |
| RRichard BidlakeRupert Crabtree | Rupert Crabtree |
 Annette CarellBillie Castiglione | Billie Castiglione |
 Jean ClaudioRaoul Maxim | Raoul Maxim |
 Jane DownsJulie (as Jane Downes) | Julie (as Jane Downes) |
 Marika RiveraParis Party Host | Paris Party Host |
 Lucille SoongAllie (uncredited) | Allie (uncredited) |
 Lydia SherwoodLady Brentwood (uncredited) | Lady Brentwood (uncredited) |
 Ann FirbankSybil Martin (uncredited) | Sybil Martin (uncredited) |
 Tyler ButterworthWilliam Prosser-Jones (uncredited) | William Prosser-Jones (uncredited) |
 Vernon DobtcheffArt Critic at Ralph Riggs Exposure (uncredited) | Art Critic at Ralph Riggs Exposure (uncredited) |
 John SchlesingerTheatre Director (uncredited) | Theatre Director (uncredited) |
 Silvia DionisioPrince Cesare della Romita's Daughter (uncredited) | Prince Cesare della Romita's Daughter (uncredited) |
