 | Marilyn Monroe als Amanda Dell |
 | Yves Montand als Jean-Marc Clement / Alexander Dumas |
 | Tony Randall als Alexander Coffman |
 | Frankie Vaughan als Tony Danton |
 | Wilfrid Hyde-White als George Welch |
 | David Burns als Oliver Burton |
 | Michael David als Dave Kerry |
| Mara Lynn als Lily Nyles |
| Dennis King Jr. als Abe Miller |
 | Joe Besser als Charlie Lamont |
 | Milton Berle als Milton Berle (uncredited) |
 | Bing Crosby als Bing Crosby (uncredited) |
 | Gene Kelly als Gene Kelly (uncredited) |
 | Joan Banks als Secretary (uncredited) |
 | Roxanne Tunis als Extra (uncredited) |
 | Madge Kennedy als Miss Manners (uncredited) |
| Ray Foster als Jimmie (uncredited) |
 | John Craven als Comstock (uncredited) |
 | Richard Haydn als Prologue Narrator (uncredited) |
 | Oscar Beregi Jr. als Chauffeur (uncredited) |
 | Geraldine Wall als Miss Hansen (uncredited) |
| Samuel Colt als Board member (uncredited) |
 | Byron Morrow als Board member (uncredited) |
| Owen Cunningham als Board member (uncredited) |
| Tom Greenway als Board member (uncredited) |
 | Larry Thor als Wilson (uncredited) |
 | Leonard Bremen als Waiter (uncredited) |
| Jerry Hausner als Willie (uncredited) |
 | Louise Vincent als French secretary (uncredited) |
| H.T. Tsiang als Charlie, restaurant proprietor (uncredited) |
 | Florence MacMichael als Receptionist (uncredited) |
 | Richard Collier als Doorman (uncredited) |
| Benny Burt als Cab driver (uncredited) |
| James Larmore |
| George Cukor | Director |
| Norman Krasna | Screenplay |
| Jerry Wald | Producer |
| Daniel L. Fapp | Director of Photography |
| David Bretherton | Editor |
| Lyle R. Wheeler | Art Direction |
| Gene Allen | Art Direction |
| Lionel Newman | Original Music Composer |
| Earle Hagen | Original Music Composer |
| Cyril J. Mockridge | Original Music Composer |
| Fred M. MacLean | Set Decoration |
| Walter M. Scott | Set Decoration |
| Dorothy Jeakins | Costume Design |
| Gene Allen | Title Designer |
| David S. Hall | Assistant Director |
| Ben Nye | Makeup Artist |
| Helen Turpin | Hairstylist |
| W. D. Flick | Sound |
| Warren B. Delaplain | Sound |
| Jimmy Van Heusen | Songs |
| Sammy Cahn | Lyricist |
| Cole Porter | Songs |
| Rube Bloom | Songs |
| Harry Ruby | Lyricist |
