Spotted: Nate Archibald with a new girl on Gossip Girl set

Update: We've discovered the actress in these photos is Ella Rae Peck.  However, we're still unsure what her role will be on the show.

Nate Archibald has had his fair share of flings in the five seasons of Gossip Girl so far.

Let's recap. There was Blair, then Serena, then Vanessa, then cougar Lady Catherine. There was a little thing with Jenny, then Blair again, followed by Bree Buckley and then Serena again. Last season he wound up with Juliet Sharp and Raina Thorpe. This season he found himself involved with yet another cougar in the form of Diana Payne and he also had a bit of a thing going with Charlie.

So, you would think that Nate would be tuckered out from all the new women in his life. In fact, we believe that his character has had the biggest "relationship" tally on the show, despite the fact that none of those relationships ever seem to work out.

But these set photos show Nate back in the saddle with yet another new woman.

This actress is a mystery to us and we're not sure how involved she will become in the overall storyline of the fifth season. But from the looks of things, it seems relatively serious.

Does anyone recognize this actress? Any thoughts on Nate's constant girl-swapping ways?