Johnny Depp's 'Pirates of the Caribbean: Dead Man's Chest'  co-star Naomie Harris has let slip her character, voodoo fortune-teller Tia Dalma, may become romantically involved with Captain Sparrow in the third film, tentatively titled 'At World's End'.

Harris claims the director, Gore Verbinski, told the two stars they could decide if their on screen relationship developed into something more serious.

She revealed: "It's supposed to be that we're lovers. We talked about it in rehearsals, but Gore Verbinski, the director, left it up to us, really, to come up with our own stories."