Not only has Kristen Stewart embraced the role of Joan Jett by dying her hair black and cutting it into a mullet for her role in the upcoming film "The Runaways," now she's been spotted at a Los Angeles studio with Runaways founding member Joan Jett.

The duo — along with Stewart's "New Moon"/ "Runaways" castmate Dakota Fanning — hit Sunset Sound studios on Monday, where they were recording for the biopic, about the seminal all-teen-female 1970s rock band of the same name. While the Runaways, founded by Jett in 1975, never achieved large-scale commercial success, they were a galvanizing force on the Los Angeles punk scene, not to mention the first widely recognized all-female teen rock group and the spawning ground for the subsequent solo careers of Jett and guitarist Lita Ford.

Stewart, who was rocking a black hoodie, straight-legged jeans and sunglasses, met up with Jett, who was in a similar outfit, but wearing a leather jacket instead of a hoodie.

This isn't the first time the two have hung out. Back in March she told MTV News that the two were already on their way to becoming fast friends. "I've been listening to [Jett's] music all the time; I spent New Year's with her," she said. "I am just trying to make myself aware of the time period and what she was going through."

Adding that the role has the "most immense responsibilities," she said the movie allows her to tell "an incredibly triumphant feminist story, really. She is an incredibly distinct personality, and so many people love and admire her, and so many people know her as just being one of the coolest people ever to live — and that, in itself, has been one of the most intimidating things that I have ever had to confront."

Check out everything we've got on "The Runaways."

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