An American In Paris (1951)

Gene Kelly and Leslie Caron make total history with this film. They're singing, they're dancing, they're out-acting one another... Although this genre of film isn't popular in the 21st Century, it still bodes well as one of the greatest cinematic marvels of the '50s.

An American ex-GI (Kelly) is living in post-war Paris when he meets Lisa Bouvier (Caron). He wants to become a successful painter and gets on that path when he catches the romantic interest of a rich American heiress.