Marketing is one of the most important aspects of a film. In the months leading up to its release, the studio puts together trailers, posters, and other materials to make the project appeal to the widest audience possible. Even when a movie is a surefire hit at the box office, stellar advertising can be the reason it goes on to break records instead of just posting decent figures. There’s no denying that film marketing has become an art form and can play a large role in how viewers perceive what’s coming through the pipeline. Here are 10 of the greatest marketing campaigns of all-time.