According to Agnès Varda, Jacques Demy had little to no experience gambling prior to making this film. Although another source states Demy decided to make the movie after winning a large bet placed on the number 17. Jackie's lucky number is also 17.
It was at a screening of this film in California that producer Roger Corman and film-writer Peter Bogdanovich found themselves sitting near each other. At the end of the film, they began talking and formed a friendship which ultimately led to Corman offering Bogdanovich the chance to direct his first film, Targets (1968), starring Boris Karloff.
In reality, Jeanne Moreau is twelve years older than Claude Mann; their characters' ages are never mentioned in the movie.
One of the earliest films to treat gambling as an addiction rather than an amusing pastime or an element of the criminal underworld.