ZetaJones230.jpgCatherine Zeta-Jones has signed on to star in the big-screen adaptation of the hit play Rock of Ages.

Zeta-Jones, who recently spoke out about and entered treatment for bipolar disorder, will play a villain, a part created just for the film version. She hasn't had a major U.S. theatrical release since No Reservations in 2007.

Director Adam Shankman told The Hollywood Reporter that Zeta-Jones' character could be the love child of Tipper Gore and Anita Bryant. She is an "arch-conservative who wants to shut down rock 'n' roll," he said.

Shankman also told E! Online that Zeta-Jones will sing at least two songs: Pat Benatar's "Hit Me With Your Best Shot" and Twisted Sister's "We're Not Gonna Take It."

He said negotiations for the part began before Zeta-Jones announced she would be entering treatment, but that she told him the announcement was coming. "I had a long talk with her about it and she's in the greatest space and spirits," he said. The actress said she entered treatment in part due to the stress of her husband, Michael Douglas', cancer.