Humphrey Bogart and Ingrid Bergman star in the iconic romance film, Casablanca. 

Great love stories are often about sacrifice. Many would argue: what truer test of devotion can there be than the willingness to give anything, everything, for the one you love? Enter Casablanca, arguably the greatest love story ever filmed, in which Humphrey Bogart and Ingrid Bergman must give up their chance at personal happiness not for each other, but for a cause that's greater than them both. It's more than just a romantic story, it's a noble one, made even more powerful by the sweeping, bittersweet memories they — and we — will always have of when they were happy in Paris.