Casablanca premiered in 1942, directed by Michael Curtiz and set in the Moroccan city of Casablanca during the Second World War. Humphrey Bogart plays Rick Blaine and Ingrid Bergman plays Ilsa Lund, former lovers reunited under impossible circumstances. The film grew from a modest Warner Bros. release into one of the most quoted movies ever made, with several of its lines entering everyday language. Short clips like this circulate online because the performances still feel intimate and instantly recognizable, even to viewers who have never seen the full film.