 Audrey HepburnMelissa Walter | Melissa Walter |
 Ray VenturaRay Ventura | Ray Ventura |
 Henri GénèsJulien | Julien |
 Georges LannesDetective / Radio Boss | Detective / Radio Boss |
 Philippe LemaireJacques | Jacques |
 Danielle GodetJacqueline | Jacqueline |
| JJohn van DreelenRudy Walter | Rudy Walter |
 Marcel DalioPoulos, Imprésario | Poulos, Imprésario |
| SSuzanne GuémardMrs. Chatenay-Maillard | Mrs. Chatenay-Maillard |
 Nicole JonescoGermaine Dubois | Germaine Dubois |
 Jackie SardouMrs. Bindinelli | Mrs. Bindinelli |
 André LuguetChatenay-Maillard | Chatenay-Maillard |
 André DalibertBrigadier | Brigadier |
 Alain BouvetteFriend of Marinette | Friend of Marinette |
 Michel AndréAnnouncer | Announcer |
| GGérard BuhrNot listed | Not listed |
 Lucien CallamandDoorman | Doorman |
| RRené BourbonFestival Director | Festival Director |
 Geneviève MorelNeighbor | Neighbor |
 Nicolas AmatoController | Controller |
| MMarcel MeralController | Controller |
 Max ElloyMax Elloy | Max Elloy |
 Jeannette BattiMarinette | Marinette |
| YY. OrrigoJohnny Walter, Melissa and Rudy's Baby | Johnny Walter, Melissa and Rudy's Baby |
| EEdmond Audran(uncredited) | (uncredited) |
 Daniel CauchyFan of Melissa (uncredited) | Fan of Melissa (uncredited) |
 Raoul CuretMember of the "Quat' Jeudis" (uncredited) | Member of the "Quat' Jeudis" (uncredited) |
| AAndré FumaMember of the "Quat' Jeudis" (uncredited) | Member of the "Quat' Jeudis" (uncredited) |
| RRoger LagierMember of the "Quat' Jeudis" (uncredited) | Member of the "Quat' Jeudis" (uncredited) |
 Jules MunshinBullfighter in Musical Melange with Antoine (Cameo) (uncredited) | Bullfighter in Musical Melange with Antoine (Cameo) (uncredited) |
