As if there weren't already enough speculation that Robert Pattinson and Kristen Stewart have taken their onscreen romance offscreen, in a set of photos taken on Saturday night at a Kings of Leon concert, it looks like the "Twilight" stars were cuddling. And in some pictures they even appear to be kissing.

According to JustJared.com, much of the "Twilight" cast was in attendance at the show held at GM Place in Vancouver on August 15, including Taylor Lautner, Ashley Greene, Kellan Lutz, Nikki Reed, Jackson Rathbone, Elizabeth Reaser, Xavier Samuel and Bryce Dallas Howard.

Us Weekly is reporting that the pair is now more comfortable with taking their alleged romance public. A source tells the magazine, "They've decided to be more public about going out now. They're not boyfriend and girlfriend, but they've definitely hooked up."

Us Weekly further reports that Billy Burke, who plays Bella's dad in the films, is cool with the pair hooking up offscreen, though he thought it might turn out to be a mistake. "If they want to date each other, fine!" Burke said. "Look, when you're that age, you're going to make mistakes. You're going to date people you probably shouldn't date. It's all part of the growing process."

Also, last week Peter Facinelli's wife, "90210" star Jennie Garth, said she knows who Pattinson is dating but couldn't reveal who it is. "I can't say. That will be breaking my promise to my husband. But I do know," teased the actress.

The Kings of Leon and the Twilighters last hung out together at the MTV Movie Awards in May, where KOL performed and the "Twilight" stars took home a slew of awards. That's also the same night that Pattinson and Stewart hoodwinked everyone when they nearly kissed onstage during the show.

Check out everything we've got on "The Twilight Saga: Eclipse."

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