| Person | Type | Job | Role(s) |
|---|---|---|---|
 Alberto De Rossi | Crew | Costume & Make-Up | Makeup Artist |
Allan Morrison | Crew | Sound | Sound Editor |
Auguste Capelier | Crew | Art | Assistant Art Director |
Bob Jones | Crew | Sound | Sound Mixer |
Charles Lang | Crew | Camera | Director of Photography |
Douglas Gamley | Crew | Sound | Orchestrator |
Edward Muhl | Crew | Production | Executive In Charge Of Production |
Garth Inns | Crew | Crew | Special Effects |
Henri Persin | Crew | Crew | Second Unit Cinematographer |
Henri Tiquet | Crew | Camera | Camera Operator |
 Henry Mancini | Crew | Sound | Original Music Composer, Songs |
Hubert de Givenchy | Crew | Costume & Make-Up | Costume Design |
Jacques Carrère | Crew | Sound | Sound Mixer |
James H. Ware | Crew | Production | Associate Producer |
 Jim Clark | Crew | Editing | Editor |
John O'Gorman | Crew | Costume & Make-Up | Makeup Artist |
Johnny Mercer | Crew | Sound | Songs |
Marc Behm | Crew | Writing | Story |
Marc Maurette | Crew | Crew | Second Unit, Assistant Director |
 Maurice Binder | Crew | Art | Title Designer |
Paul Stader | Crew | Crew | Stunts |
 Peter Stone | Crew | Writing | Screenplay, Story |
 Stanley Donen | Crew | Directing | Director, Producer |
Vincent Rossell | Crew | Camera | Still Photographer |
Jean-André d'Eaubonne | Crew | Art | Art Direction |
Léopold Schlosberg | Crew | Production | Production Manager |
Arthur Carroll | Crew | Production | Production Director |
 Robert Ellis | Crew | Visual Effects | Animation |
 Antonio Passalia | Cast | Actor | Italian Representative at URESCO (uncredited) |
 Audrey Hepburn | Cast | Actress | Regina Lampert |
 Bernard Musson | Cast | Actor | Hotel Receptionnist (uncredited) |
 Cary Grant | Cast | Actor | Peter Joshua |
 Chantal Goya | Cast | Actress | (uncredited) |
Claudine Berg | Cast | Actress | Maid (uncredited) |
 Clément Harari | Cast | Actor | German Tourist (uncredited) |
 Dominique Minot | Cast | Actress | Sylvie Gaudel |
 George Kennedy | Cast | Actor | Herman Scobie |
 Jacques Marin | Cast | Actor | Edouard Grandpierre |
 Jacques Préboist | Cast | Actor | Ice Cream Salesman (uncredited) |
 James Coburn | Cast | Actor | Tex Panthollow |
Jean Gold | Cast | Actor | Writer On Cafe Terrace (uncredited) |
Louis Viret | Cast | Actor | Hallmark Employee On Subway (uncredited) |
 Marc Arian | Cast | Actor | Subway Passenger (uncredited) |
 Marcel Bernier | Cast | Actor | Taxi Driver (uncredited) |
 Michel Thomass | Cast | Actor | Embassy Driver (uncredited) |
 Monte Landis | Cast | Actor | Master of Ceremonies at Club (uncredited) |
 Ned Glass | Cast | Actor | Leopold Gideon |
 Paul Bonifas | Cast | Actor | Mr. Felix |
Peter Stone | Cast | Actor | Man in Elevator / Marine (voice) (uncredited) |
 Raoul Delfosse | Cast | Actor | Taxi Driver (uncredited) |
 Roger Trapp | Cast | Actor | Mortuary Employee (uncredited) |
Stanley Donen | Cast | Actor | Man in Elevator (voice) (uncredited) |
Thomas Chelimsky | Cast | Actor | Jean-Louis Gaudel |
 Walter Matthau | Cast | Actor | Hamilton Bartholemew |
Albert Daumergue | Cast | Actor | Man in Stamp Market (uncredited) |
| Person | Type | Job | Role(s) |
