This is definitely OMFG material.

We've uncovered a photo of the amazing Dan Humphrey (Penn Badgley) in an upcoming episode of Gossip Girl. He's kissing another character ... and it's not Serena van der Woodsen (Blake Lively).

Consider yourself warned. Follow the jump for a scandalous Gossip Girl spoiler you never saw coming ... or who knows, maybe you did.

Yes, that's Dan and Georgina (Michelle Trachtenberg), kissing on the set of Gossip Girl. They were shooting on location in Queens, N.Y.

Georgina Sparks, as we've told you, plays a troublemaker from Serena's past. Apparently she will be causing trouble in the future, as well!

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