Hilary Duff has picked a new catfight with Oscar winner Faye Dunaway over her plans to star in the remake of Bonnie And Clyde.

After sparring with Lindsay Lohan and Avril Lavigne in the past Duff has decided to pick on the Hollywood veteran after she poked fun at the casting in the update of the classic film, which she won an Oscar nomination for.

Last week, the caustic Dunaway asked, "Couldn't they have at least cast a real actress?"

And, rather than take the high road, Duff has retaliated by suggesting her fans don't know who Dunaway is.

The singer says, "I think that my fans that are going to go see the movie don't even know who she is. I think it (what she said) was a little unnecessary, but I might be mad if I looked like that now too."

(This news article provided by World Entertainment News Network)