The Lady and the Tramp (1968)

Original title: Η Αρχόντισσα κι ο Αλήτης

Rena’s father insists on marrying her off to the son of a shipowner. Rena, however, doesn’t even want to hear about it, so she runs away and disguises herself as a boy named Pipis. As such, she meets a poor fisherman, Lefteris, and helps him on his way to Ioannina.