1. Casablanca

The ultimate romantic classic! The 1942 movie stars Humphrey Bogart and Ingrid Bergman and tells the story of a cynical nightclub owner who has to decide whether to help his former lover and her fugitive husband escape from the Nazis in Morocco during World War II.

The movie has an IMDb score of 8.5 and is still quoted in modern culture more than 80 years on from its release.