Okay, this is just strange.

When Penn Badgley and Blake Lively began dating, that was one thing.

But Leighton Meester dating Sebastian Stan - a.k.a. Carter Baizen?

It's the truth. Here's a photo of the two of them, hand in hand, leaving a bowling alley at Chelsea Piers in New York City Tuesday...

And yes, that's actually Ms. Meester, even if you can't see her face. Click here for another shot of just Leighton from the same night.

Besides Gossip Girl, Sebastian Stan, 24, is best known as Chase Collins in the film The Covenant (which also featured Chace Crawford).

Thoughts on the real life Blair-Carter pairing?

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.