Based on the popular book series of the same name, this drama gives viewers a peek into the world of privileged teenagers on an elite private school in New York City. The story is written by The O.C.'s Josh Schwartz and Stephanie Savage, and directed by Mark Piznarski who has worked on series like Everwood and Veronica Mars.Surface's Leighton Meester and Accepted's Blake Lively have taken the lead roles in this drama series. They will play Blair and Serena respectively, rich Manhattan rivals at a private school in New York. The last additions to this new CW drama are Misconceptions' Taylor Momsen, The Covenant's Chace Crawford and The Bedford Diaries' Penn Badgley. Their characters are Momsen as Jenny a 14 year-old and shy girl, Nate the good looking boyfriend of Blair, and Dan the secret admirer of Serena. E-Ring's Kelly Rutherford and The Jury's has been cast as the mother of lead role Serena. Rutherford will play the mother of Serena van der Woodsen (Lively's character), a former ballerina and rock groupie. Afterlife's Ed Westwick has been cast as Chuck Bass and Brothers and Sisters' Matthew Settle has been cast as Jenny and Dan's father, Rufus Humphrey.