The black and white part was not intended for artistic purpose but due to a lack of money. Lelouch could not afford having all the film developed in color.
Claude Lelouch shot this movie with a team of seven persons only.
Claude Lelouch was reportedly in love with Anouk Aimée during the shooting of A Man and a Woman (1966), but was unsuccessful in winning her heart, since she was already romantically involved with the composer Pierre Barouh (who had written a song for the film), whom she'd later marry.
John Travolta's favorite movie.