In her early twenties, Trachtenberg rose to prominence in cult classic EuroTrip (2004) and as Georgina Sparks on the CW TV show Gossip Girl, which ran from 2007 to 2012.

She also earned a Daytime Emmy Award nomination for her role as the host of the Discovery Kids series Truth or Scare (2001–2003).

Trachtenberg was born on October 11, 1985,[1] in New York City,[2] the daughter of Jewish immigrants; her grandparents reside in Israel.

That same year, Trachtenberg played Wendy in Gregg Araki's film adaptation of Scott Heim's novel, Mysterious Skin.

She also had a recurring role in the HBO series Six Feet Under, as Celeste, a spoiled pop star for whom Keith Charles served as a bodyguard.

In March 2005, she starred in Walt Disney Pictures' comedy sports drama film Ice Princess as Casey Carlyle, a science whiz, who is torn between a future in academia and her newfound dream of being a professional figure skater.

She revealed on the December 22, 2006, episode of Late Night with Conan O'Brien that House was her favorite show, and that she was friends with one of the producers and had asked to be a guest star.

[16] She 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.

[21] On June 9, 2011, Trachtenberg guest starred on Love Bites, as Jodie, who, after being unceremoniously dumped, decides – with a vengeance – to accept her ex's offer to "be friends".

In the same year, Trachtenberg was a guest star on Weeds during its seventh season,[22] portraying Emma, a rival pot dealer who causes problems for Silas Botwin.