Casablanca

Casablanca isn't a movie that people would think to associate with mythology. But when you look close, there is so many aspects that are directly connected to mythology archetypes.
Humphrey Bogart plays Rick, the hero. At first he seems rough around the edges, but by the end of the movie it is clear that he is the true hero of the film. In the end, he sacrifices his own happiness for others. He does what he thinks is right in the end.
Ilsa basically plays the Damsel in Distress. She vulnerable and confused. Rick and Ilsa are the star-crossed lovers, who just want to be together but can't be because of issues with their society, just like in Romeo and Juliet, Pyramus and Thisbe and other stories. Ilsa is married, and is trying to get to America with her own husband, so Rick doesn't fit into her future. But she loves Rick and wants to be with him. So they make plans in secret to run away together, like R&J and P&T.
Ilsa is also The Unfaithful Wife, because she is married, but she loves Rick. Rick of course loves her back and together they make official plans to leave Casablanca together but unfortunately, their plans don't work out. Ilsa leaves with her husband and Rick is left behind. So this story, along with the classic Romeo and Juliet stories, ends in tragedy.

So the main characters of the film were built around archetypes in mythology. It seems that no matter when the movie was made, what the movie is about and who in the movie there is always some kind of connection to mythology.