Thursday 15 May 2008 10:00pm - 11:00pm

Devastated by the state of her relationship with Nate and still dealing with the guilt from a recent indiscretion, Blair puts on a happy face for her 17th birthday party and attempts to hide the truth from her friends.

Hoping to ease the tension between Serena and Vanessa (recurring guest star Jessica Szohr), Dan takes Vanessa to Blair's party so the girls can have some bonding time, but this only ends up making Serena more uncomfortable.

Meanwhile, Jenny brings her mum (recurring guest star Susan Misner) home for a surprise visit, but Rufus may not be ready to forgive and forget. And Nate's parents ask him to make a huge sacrifice in order to salvage the business of his father, who faces charges of embezzlement and fraud.

Gossip Girl is based on the novels by Cecily von Ziegesar and executive produced by Josh Schwartz and Stephanie Savage.

ITV2 channel controller Zai Bennett says: “I’m delighted that we’ve secured this brand defining acquisition for ITV2”.

Dawn Ostroff from the CW Television Network, America’s fifth broadcast network and the only network targeting young adults between 18-34, adds: “People everywhere are talking about Gossip Girl and we believe this show will continue to build. Josh Schwartz and Stephanie Savage have created an incredibly heightened-reality world that viewers are locking into.”