Trachtenberg also appeared in the Fall Out Boy music video for "This Ain't a Scene, It's an Arms Race", the Joaquin Phoenix-directed music video for "Tired of Being Sorry" by Ringside, and the video for the Trapt song "Echo".
In 2006, Trachtenberg starred in Black Christmas, the remake of the 1974 slasher of the same name.
She reprised the role on June 16, 2011, and in the series finale on July 21, 2011.
In the same year, Trachtenberg was a guest-star on Weeds during its seventh season, In the Criminal Minds episode "Zugzwang", Trachtenberg played Diane Turner, the criminal stalker to Spencer Reid's girlfriend, Maeve Donovan. She also had a small role in the comedy film Cop Out.
In November 2006, Trachtenberg guest starred in season six of the crime drama Law & Order: Criminal Intent.
Mecklenberg in The Adventures of Pete & Pete (1994–1996), Dawn Summers in Buffy the Vampire Slayer (2000–2003), and Georgina Sparks in Gossip Girl (2008–2012). Mecklenberg on the Nickelodeon series The Adventures of Pete & Pete from 1994 until 1996.
In 2007, she was cast as the female lead in an ABC comedy pilot called The Hill, based on the newspaper of the same name in Washington, D. In 2009, Trachtenberg was a cast member on the NBC drama Mercy; the series lasted one season.
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".
Don't let the angelic smile fool you, I'm sure I was up to no good. A post shared by Michelle Trachtenberg (@michelletrachtenberg) on Regarding her education, she attended junior high school at The Bay Academy for the Arts and Sciences.
Later she attended Notre Dame High School in Sherman Oaks, California.