Hilary Duff is hoping her role in new movie War, Inc. will kill her good-girl image once and for all.

The 20-year-old has wrestled with the label since rising to fame as a clean-cut teen pop star.

She recently revealed her desire to be recognised as an adult - and went to great lengths in the movie to do so.

Duff travelled unaccompanied to Bulgaria to film the movie with co-stars John Cusack, Sir Ben Kingsley and Marisa Tomei, dying her trademark blonde locks for a darker hairdo to play onscreen temptress Yonica.

She says, "I got to play a character far away from who I am in my real life."

"I got to be a little bit of a bad girl for a change."

War Inc. premieres on Monday at New York's Tribeca Film Festival.