Are Chace Crawford & Rebecca Rittenhouse Dating? The 'Blood And Oil' Costars Are Really Cute Together — PHOTOS

Well, it looks like Gossip Girl's Nate Archibald is no longer single. According to Us Weekly, Chace Crawford is dating Rebecca Rittenhouse. It appears the two met on the set of the upcoming ABC series Blood & Oil , where they play married couple Billy and Kelly LeFever. The duo was spotted celebrating Crawford's 30th birthday on July 25, where Rittenhouse was said to be "by Chace's side most of the night," according to a source who spoke with Us. Another source told the publication that “He and Rebecca have been hanging out,” but it's “nothing serious.” That same insider also said, “They had great chemistry on set and he really enjoys hanging out with her.”

As for whether they're serious or official, the source said, “I wouldn’t call them official, but there is a romance between them for sure." I'm going to have to disagree with this source, because based on a photo Crawford shared on Instagram Tuesday, they sure seem serious and somewhat official. As you can see below, he captioned the photo: "Rebecca by my side, I love you." When someone declares their love for another person that means they're serious, right? Maybe the GG actor is just saying he loves the Red Band Society actress as a friend, but it definitely seems like more than that.

Whatever the case, they sure are cute together. I mean, just look at these photos of the pair together that pretty much say, "Yeah, we like — and probably love — each other. A lot."

I have a feeling Gossip Girl would have a lot to say about this relationship. XOXO.