Blake Lively Serena van der Woodsen Actor Leighton Meester Blair Waldorf Actor Chace Crawford Nate Archibald Actor Penn Badgley Dan Humphrey Actor Taylor Momsen Jenny Humphrey Actor Ed Westwick Chuck Bass Actor Kelly Rutherford Lily van der Woodsen Actor Matthew Settle Rufus Humphrey Actor Sebastian Stan Carter Baizen Guest Star Harmon Walsh Julian Rawlins Guest Star Laura Breckenridge Rachel Carr Guest Star Josh Schwartz Executive Producer Stephanie Savage Executive Producer Norman Buckley Director Jessica Queller Writer