This is not really what you expect from Henri Verneuil : it's an old-fashioned comedy ,which will remind you of Mitchell Leisen 's "remember the night" and " midnight",(late thirties,early forties)both dealing with what we can call the "Cinderella syndrome ";it was shot in color ,at a time it was rare in the French cinema and it enhances the scene of the "Réveillon Surprise" where the young couple enters the luxurious ballroom .A manicurist (Françoise Arnoul), who dreams of a wonderful Christmas in the four-star hotel where she works meets a mechanic who passes himself off as a wealthy owner of a shipyard (he drives a car where you can enjoy all the orchestra in the worlds ,thanks to a record -player : today it would be in a museum);as she does not want to be outdone by him,she asks an ageing rich businessman (Charles Boyer) to pretend he is her dear dad ,thus making her a heiress.Fortunately his wife (they really made Tilda Thamar look ugly) will be away for a while although she remains present for her photographs -which are not very flattering- seems to keep an eye on her husband .Then begins a night to remember ,an eventful night ; the screeenplay by Charles Spaak is a bit derivative,but he avoids vulgarity and his comedy is often as light and as sparkling as Champagne ,with witty lines .Supporting act by Raymond Bussières as the mechanic's colleague 'Soupape" (=valve) who in his scenes effortlessly steals the show from the bland romantic male lead (Roberto Risso);Louis Seigner is also great as the indignant millionaire whose luxury car was stolen right under the hotel staff's nose .Like this? Try this.."Le Dix-septième Ciel " aka "Un Garçon,Une Fille " (Serge Korber)