This is it, fans. We've read the Gossip Girl spoilers and prepared for this episode all week. Now it's finally time to watch the drama unfold.
Is Blair Waldorf really pregnant - and if so, is Chuck or Nate the father? Does Serena have a surprise of her own in store for Dan? What becomes of Rufus and Lily? These questions and many more must be answered tonight.
Tell us what you think by joining our Gossip Girl forum. Click to discuss "The Thin Line Between Chuck and Nate" and share your views!