Michelle Christine Trachtenberg

• Guest appearances
In April 2006 Trachtenberg guest-starred in the episode of House, M.D., "Safe". She revealed on the December 22, 2006, episode of Late Night with Conan O'Brien that House is her favorite show, she is friends with one of the producers and she asked to be a guest star.
In November 2006, Trachtenberg guest-starred in the sixth season of the Emmy-nominated crime drama Law & Order: Criminal Intent. In the episode "Weeping Willow", she played the role of Willow, a kidnapped video blogger based on lonelygirl15. Trachtenberg also made a cameo in the Fall Out Boy music video for "This Ain't a Scene, It's an Arms Race" (with fellow Buffy cast member Seth Green), Joaquin Phoenix-directed video "Tired of Being Sorry" for Balthazar Getty's band Ringside, and Trapt's video Echo. In December 2006, Trachtenberg starred in Black Christmas, the remake of the 1974 slasher of the same name. In 2007, she was cast as the female lead in an ABC comedy pilot called The Hill, set in Washington, D.C. Trachtenberg provided the voice of Tika Waylan for Dragonlance: Dragons of Autumn Twilight, a direct-to-video animated movie based on the novel of the same name.
Trachtenberg appeared on The CW hit show Gossip Girl as Georgina Sparks, who recently left rehab and brings back the dark past Serena van der Woodsen desperately wants to leave behind. She returned to the show for a multi-episode story arc towards the end of the second season. Trachtenberg appeared in the season 3 finale and the season 4 premiere. In 2009, Trachtenberg was a cast member on the NBC drama Mercy, the series however was not renewed for a second season.