King Thrushbeard
Король дроздовик / King Thrushbeard (1984)
When a selfless king learns of a beautiful princess in a neighboring kingdom who callously turns down every suitor with an insult, he tries his luck to no avail. So, he hatches a plot with her father in which the princess is married to him, in disguise as a beggar, so he can teach her lessons about humility and compassion.