L'Âge ingrat

That Tender Age, is a 1964 French comedy film directed by Gilles Grangier that unites two major stars in Jean Gabin and Fernandel. It recounts how two families are drawn together by an engagement between two of their children, are then torn apart when the young couple fall out, and are finally reconciled.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.