She might very well be crashing Blair Waldorf’s Royal Wedding during Gossip Girl’s much-teased 100th episode — but don’t for a second think that Georgina Sparks (Michelle Trachtenberg) will simply go slinking off into the background after that!

Credit: Michelle Trachtenberg on Twitter Photo: Michelle Trachtenberg as Georgina and Leighton Meester as Blair on Set for Gossip Girl on December 12, 2011

As reported earlier, Michelle Trachtenberg is returning to GG for “a sizeable arc” over the back half of Season 5. Details on the rest of Georgina’s UES stay are slim, but knowing Georgina … we’re pretty sure she’s here to cause trouble.

But will Blair (Leighton Meester) get caught up in her schemes? On December 12, Michelle tweeted a cute behind-the-scenes photo of her and Leighton on set. “I spy with my #GossipGirl eye, @itsmeleighton #GeorginavsBlair!” she wrote.

Georgina vs. Blair, huh? That’s one snarky diva-off we certainly wouldn’t want to get in the way of!

Any ideas, GG fans? What do you think this Georgina/Blair drama will be about?

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