Pirates of the Caribbean: On Stranger Tides film provided him a long-awaited opportunity to work with Depp, and that his directing was helped by his experience as a choreographer—"the action sequences felt like big production numbers." On September 11, 2009, at Disney's D23 convention during a Disney event, Cook and Johnny Depp, in full Captain Jack Sparrow costume, announced that a fourth "Pirates" film was in development. The title was announced as "Pirates of the Caribbean: On Stranger Tides". Marshall visited the Pirates of the Caribbean ride in Disneyland for inspiration, eventually paying homage with a skeleton holding a magnifying glass in Ponce de León's ship. An
Pirates of the Caribbean: On Stranger Tides the Caribbean: On Stranger Tides" the most expensive film ever made to date. Bruckheimer said the decision to film in 3D was made due to its being "immersive filmmaking; I think it makes you part of the actual filming because you're part of the screen." Bruckheimer described it as the first major "exterior movie" to be shot in 3D, as "Avatar" was mostly done in sound stages. At first Marshall was not much interested in 3D, but the director eventually considered it a film that could benefit from the format. "You are on an adventure and with the 3D experience