In "Edgeplay," the documentary about the Runaways, Cherie Currie declared that bandmate Joan Jett is good in bed. That tantalizing revelation raised as many questions as it answered about the '70s rock icons, and the new feature film, "The Runaways," does not shy away from exploring the specter of girl-on-girl sexuality.

Kristen Stewart as Jett and Dakota Fanning as Currie are seen woozily [article id="1630405"]locking lips[/article] and then waking up in bed together. So were the two musicians in a relationship? Were they just two teens having fun? These remain open questions, even for the two actresses.

"They were really good friends, and whatever happened just kind of happened," Fanning told MTV News.

"They had a really unique relationship," Stewart echoed.

No doubt this is delicate territory, and Stewart and Fanning strove to shed light on the relationship without explicitly defining it.

"Just as any two girls who are in a crazy situation, it's heightened circumstances, clearly," Stewart said. "They really relied on each other, and Joan, I think, could really see a vulnerability in Cherie. In terms of it being a romantic thing, that's semi-ridiculous. Romance was not at the top of their list. It was so not like that. In the movie, we touch on that because it sort of captures the essence of the movie perfectly. It's like, 'God, they just did something, and they didn't really think about it.' It was fun, and then they didn't talk about it afterwards."

Whatever the exact nature of Jett and Currie's connection, Fanning said that the two rockers retain a deep connection. "They definitely do love each other to this day," she said. "They're so close, and seeing them together was even more helpful than seeing them apart. Watching the relationship revert back to how it was back then, you can just see their 15-year-old selves even today."

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

For young Hollywood news, fashion and "Twilight" updates around the clock, visit HollywoodCrush.MTV.com.