First Pictures of Sebastian Stan on GOSSIP GIRL Season 3 (SPOILERS) September 8, 2009 Gossip Girl Sebastian Stan as Carter, Blake Lively as Serena Check out out the first pictures of Sebastian Stan as Carter on GOSSIP GIRL season 3 episode 3 which airs Monday, September 28 at 9pm on the CW. Carter (Sebastian Stan) and Serena (Blake Lively) have apparently gotten really close over the summer. I wonder how that relationship is going to evolve, and even better, how is Dan going to react. Sebastian Stan as Carter, Blake Lively as Serena Blake Lively as Serena, Penn Badgley as Dan Ed Westwick as Chuck Blake Lively as Serena Blake Lively as Serena Blake Lively as Serena, Leighton Meester as Blair Chace Crawford as Nate, JoAnna Garcia as Bree Blake Lively as Serena Leighton Meester as Blair, Blake Lively as Serena Sebastian Stan as Carter, Blake Lively as Serena Sebastian Stan as Carter, Blake Lively as Serena (Photos: Courtesy of The CW) Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pocket (Opens in new window)