Stewart Keen to Sing in Jett Biopic

Twilight star Kristen Stewart will be belting out her own rock tunes when she plays Joan Jett in upcoming biopic Runaways

The actress, who showed off her singing skills while performing karaoke with Twilight co-star Robert Pattinson in Japan last month, insists fans will be able to hear her voice on the soundtrack for the new film, which chronicles the success of Jett’s all-girl band.

She says, “If it’s not going to be Joan, it’s going to be me.”

(c) 2009 WORLD ENTERTAINMENT NEWS NETWORK LTD. All global rights reserved. No unauthorized copying or re-distributing permitted

MORE NEWS: Heath Ledger’s Oscar to Be Delivered to Ex