Melbourne, Apr 7 : American actress/singer Hilary Duff is all set to shed her good girl image with a raunchy role in her upcoming film.

The 20-year-old star plays the role of a "slutty" pop star in the John Cusack film, War, Inc, based on war profiteers.

"She played a pop idol from central Asia. So, she was like a Hilary but not Hilary, because Hilary is so classy, but like a real, and I won't name names, but a real slutty pop star. ... Hilary is the opposite of that, of course," News.com.au quoted Cusack, as telling MTV.

"I think for her to play that, or to parody that, was really great.

"I think probably people wouldn't know how talented she is. I mean, she's a great actress. I just spent the entire fall with her and she was a revelation every day. I don't think people know that yet, but they're gonna," he added.

The 'Cinderella Story' star also admitted that she was hesitant to play the part of a singer, in fear of being typecast.

"He (agent) was like, 'I got this script, John Cusack wrote it. And I was like, 'Really? That's awesome, I love John,'" Duff said.

"But then he says, 'But you'd have to play a pop star.' And I was like, 'Oh nooooooooooo. I don't want to play a pop star. I don't want to sing!' "

"Nobody thought I could do anything different. It was tough for a while. I was stuck in this bubble of Hilary Duff, and no one was really taking a chance on me.

"So I was like, 'I'll just make the record, because I'm not going to do another movie like that.' I wanted to challenge myself or not do it," she added.

ANI