"They’re professionals," an insider tells Us. "They're still good friends and hang out on the set." The source says that couple "kept this news to themselves for a while" and that no one on set had any idea because they were so private.
Of course this probably doesn't come as a total surprise. During Fashion Week last month, Blake was seen cavorting all by herself while boyfriend Penn wasn't really in the picture. Not to mention the fact that Blake was spotted getting ice cream with Ryan Gosling two weeks ago. It didn't take a Dr. Phil to know that something was up. Still, this is sad news — it seems no one on Gossip Girl can stay together! Then again, is the end ever really the end for these crazy kids?