La fille aux yeux d'or aka The Girl with Golden Eyes (1961)

A bored Parisian rake starts a half-hearted affair with a beautiful and naïve girl met in the street. She is extremely secretive about herself, to the extent of concealing even her name. This, contrasted with her submissiveness, gets on his nerves and makes him behave more and more erratically until he realises he must be in love with her. But by that time a third party makes an unexpected entrance and turns the affair into a tortured love triangle.

Loosely based on a novel by Honore de Balzac, a skirt-chasing fashion photographer meets a charming young woman who captures his interest immediately. She is not wholly forthcoming, but after a period of time, he realizes that he is in love with her – she is not just another conquest. It takes awhile before he also realizes that she is the partner of his femme associate who is possessive, at the very least. As it turns out, one corner in this odd triangle is highly unstable. This was one of the early films of Françoise Dorleac, Catherine Deneuve's beautiful sister who was killed in an automobile accident in 1967.