Connections

In both movies we see Michel Simon getting his hair cut by a dog clipper.

Both feature a stranger who enters a family's life, seducing all and sundry.

While being disguised as a drunk tramp, Belmondo imitates Michel Simon's typical tone of voice and acting gimmicks in the movie, hence paying tribute to his iconic pair.

Gene Siskel notes that "Down and Out in Beverly Hills" (1986) owes a debt to this movie.