'Runaways' Kristen Stewart and Dakota Fanning Join Joan Jett OnstageRelated: Kristen Stewart, Dakota Fanning
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Taking some time away from the "Twilight" films, co-stars Kristen Stewart and Dakota Fanning joined rock icon Joan Jett onstage for a night of rock n' roll.
Related: More Kristen Stewart photos
The young actresses star in a biopic about Jett's '70s band The Runaways, which premiered at the Sundance Film Festival on Sunday, Jan. 24. While performing in Park City, Utah on Saturday night, Jett asked the girls to come up onstage and thanked them for their work on the film, People.com reports. She then continued to rock out with The Blackhearts as Stewart and Fanning looked on backstage.
Video: Get the latest Sundance news
In the film, Stewart and Fanning respectively star as guitarist Joan Jett and singer Cherie Currie, who were both members of the all-girl, '70s rock band The Runaways, known for their hit song "Cherry Bomb" among others.
"The Runaways" is due to be released on March 19.
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