Joan Jett Instructs Kristen Stewart to Grind her Guitar: So to Speak

Joan Jett told Kristen Stewart to "fuck" her guitar.

Stewart, who plays the iconic Jett, a musician living the gritty rock 'n' roll lifestyle in the upcoming rocker biopic The Runaways,  has revealed Jett had some real words of wisdom to help her prepare for the role.

"Put your pussy to the wood! Fuck your guitar!" was Jett's advice to the young woman portraying her, Stewart told The Vancouver Sun.

The Runaways, which had its world premiere at the Sundance Film Festival Sunday night, chronicles the legendary girl rock band also made up of Cherie Currie (Dakota Fanning), Lita Ford (Scout Taylor-Compton) and Sandy West (Stella Maeve). Coming together in Los Angeles while they were still teenagers, the foursome broke musical boundaries with their rebellious naughty-girl attitudes and catchy guitar hooks. The Runaways paved the way for future generations of girl bands.

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The film chronicles Joan's and Cherie's tumultuous relationship on and off stage, as the band starts to break out.

"People don't realize The Runaways were the first girls playing music like that. And really, it could have been anybody, but it was them (and finding out why) made it an interesting movie," says Stewart.

"Both (of these women have) a dominant sexuality. They had to fight," says Stewart. "People like girls to be sexy and they did then, too, but in a different way. They didn't want to get f---ed (by the girl), they wanted to f--- them."

As far as the film demanding  a girl-on-girl kiss between the two leads, "People are always going to find the weird, buzz-worthy thing about a movie and run with it. I don't think it's really relevant. It's not a romantic relationship. They are best friends and a fleeting love story, and they both realize it. They see it's cool right now ... but they don't even talk about it afterwards." Stewart said.

Stewart says as an actor, the "makeout scene" wasn't the most daunting part of that particular shooting day.

"We were doing a song that day ... and I was way, way more worried about that," says Stewart, who learned how to sing and play guitar for the role.

"Although, I do remember a few extras taking pictures, (and that) really, really pissed me off."

"I don't think it was ever a big deal to me," Fanning explained the kissing scene in the film "was just a thing, another day" for the characters.

The Runaways is slated for a March 19 release.

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