Audrey Hepburn (Jo Stockton), Fred Astaire (Dick Avery), Kay Thompson (Maggie Prescott), Michel Auclair (Prof. Emile Flostre), Robert Flemyng (Paul Duval), Dovima (Marion), Suzy Parker (Specialty Dancer (Think Pink Number)) more..., Sunny Hartnett (Specialty Dancer (Think Pink Number)), Jean Del Val (Hairdresser), Virginia Gibson (Babs), Sue England (Laura), Ruta Lee (Lettie), Alex Gerry (Dovitch), Bess Flowers (Fashion Show Spectator), Iphigenie Castiglioni (Armande), Bert Stevens (Guest at Aborted Fashion Show), Harold Miller (Guest at Aborted Fashion Show (uncredited)), Franklyn Farnum (Guest at Duval's Fashion Show (uncredited)), Brandon Beach (Guest at Aborted Fashion Show), Carole Eastman (Specialty Dancer (uncredited)), Leoda Richards (Fashion Show Spectator), Marion Gray (), Marilyn White (Receptionist (uncredited))

Alexander Courage (Orchestrator), Adolph Deutsch (Orchestrator), Adolph Deutsch (Conductor), Edith Head (Costume Design), Hal Pereira (Art Direction), Sam Comer (Set Decoration), Ray Moyer (Set Decoration) more..., Wally Westmore (Makeup Supervisor), George Leverett (Sound Recordist), George W. Davis (Art Direction), Roger Edens (Producer), Roger Edens (Additional Music), Ray June (Director of Photography), Frank Bracht (Editor), George Gershwin (Original Music Composer), Fred Astaire (Choreographer), Nellie Manley (Hair Supervisor), Van Cleave (Orchestrator), John P. Fulton (Special Effects), Leonard Gershe (Writer), Leonard Gershe (Additional Music), Conrad Salinger (Orchestrator), Farciot Edouart (Special Effects), Hubert de Givenchy (Costume Design), William McGarry (Assistant Director), Winston H. Leverett (Sound Recordist), Eugene Loring (Choreographer), Richard Mueller (Other), Skip Martin (Orchestrator), Richard Avedon (Title Designer), Carmel Snow (Thanks), Mike Semenario (Grip), Robert McCrellis (Props), Charles Sickler (Grip), George Gershwin (Songs), Ira Gershwin (Lyricist),