The yellow jacket worn by lead Jean-Hugues Anglade was discovered in a Parisian flea market by the film's costume designer Elisabeth Tavernier who purchased it for less than $5.
Frédéric Andréi:
When in Paris, Betty briefly goes to the rail tracks and Jules, the postman played by Frédéric Andréi in Diva, also directed by Jean-Jacques Beineix, can be seen walking past her.