Kristen Stewart's rock chick look
Kristen stars in the biopic as rocker Joan Jett, who co-founded LA girl band The Runaways in the mid-70s.
Kristen's long brunette locks, which she wears loose and wavy in the Twilight films, were chopped into Joan's infamous 'shag' hairdo.
Joan Jett made the hairstyle her own, although the look was inspired by glam-rocker Suzi Quatro, who she was obsessed with as a teenager.
The film is released in the US in March and expected to hit UK cinemas later in 2010. Whether Kristen's look in the movie will spark a revival of the shag hairdo remains to be seen!
Shop online now to get Kristen Stewart's 70s hair look...