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 (soundtrack) ago", and that he decided to add a "Spanish element" to "On Stranger Tides". Many musicians worked with Zimmer in the score. The biggest collaborators were Mexican duo Rodrigo y Gabriela, whose music Zimmer met after being given their album by a friend. Zimmer said they were picked for the soundtrack because the duo "play rock n' roll with flamenco guitars". American composer Eric Whitacre helped with choir-based songs, most notably the mermaid theme, and brought along his soprano wife, Hila Plitmann. Penélope Cruz's brother Eduardo Cruz wrote a tango song, and Geoff Zanelli contributed to many tracks. Trumpetist Arturo