MUMBAI: Walt Disney has hired veteran consultant Valerie Van Galder to handle the marketing of the fourth film of its flagship film franchise Pirates of the Caribbean: On Stranger Tides.

Disney has had a tough summer with live-action films, with two of its disappointments -- Prince of Persia: The Sands of Time and The Sorcerer‘s Apprentice.

The first two Pirates sequels were global blockbusters: 2006‘s Dead Man‘s Chest made $1.06 billion worldwide while 2007‘s At World‘s End made $960 million.