Nathalie is a 1957 French-Italian comedy crime film directed by Christian-Jaque and starring Martine Carol, Mischa Auer and Michel Piccoli. It was shot at the Joinville Studios of Franstudio and the Photosonor Studios, both in Paris. Location shooting also took place around the city including the Printemps department store and Paris Airport. The film's sets were designed by the art director Robert Gys. It was followed by a sequel Nathalie, Secret Agent in 1959, also starring Carol.
Nathalie, a model at a Parisian fashion house is wrongly accused of a stealing a valuable clip from a customer, the countess de Lancy. When it is discovered soon afterwards she takes it to the Neuilly residence of the countess, but finds her dead. She is then kidnapped by some gangsters but manages to escape, and makes contact with a police officer she is friendly with. Together they embark on an investigation. She discovers that the countess was the leader of a gang of thieves, who has been murdered by an underworld rival.