Blake Lively Serena van der Woodsen Actor Leighton Meester Blair Waldorf Actor Penn Badgley Dan Humphrey Actor Chace Crawford Nate Archibald Actor Taylor Momsen Jenny Humphrey Actor Ed Westwick Chuck Bass Actor Jessica Szohr Vanessa Abrams Actor Kelly Rutherford Lily van der Woodsen Actor Matthew Settle Rufus Humphrey Actor Gina Torres Gabriela Abrams Guest Star Hilary Duff Olivia Burke Guest Star Sebastian Stan Carter Baizen Guest Star Josh Schwartz Executive Producer Stephanie Savage Executive Producer Bob Levy Executive Producer Leslie Morgenstein Executive Producer John Stephens Executive Producer, Director Jake Coburn Writer