Buffy the Vampire Slayer (2000–2003) – Trachtenberg played Dawn Summers, Buffy’s younger sister, in this iconic supernatural series. Her character’s mysterious origins and emotional journey made her a key part of the show’s later seasons.

Gossip Girl (2008–2012) – She portrayed the scheming Georgina Sparks, a manipulative socialite who constantly stirred up drama. Her character’s unpredictability and sharp wit made her a fan favorite.

The Adventures of Pete & Pete (1994–1996) – One of her earliest roles, she played Nona F. Mecklenberg, a quirky and free-spirited friend of Little Pete. The surreal and nostalgic Nickelodeon classic remains a cult favorite.
Harriet the Spy (1996, TV Movie) – While primarily known as a film, this Nickelodeon adaptation of the classic children’s book was a TV staple. Trachtenberg starred as Harriet, a curious and determined young spy, in one of her most beloved roles.
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Six Feet Under (2004) – In a guest appearance, she played a troubled pop star struggling with fame and self-destruction. Her performance added depth to the critically acclaimed drama’s exploration of mortality and personal demons.

Mercy (2009–2010) – Trachtenberg starred as Chloe Payne, an eager young nurse navigating the challenges of a chaotic hospital. The medical drama offered a compelling look at the personal and professional lives of healthcare workers.

Robot Chicken (2006–2022) – She lent her voice to multiple episodes of this darkly comedic stop-motion series. Her roles often parodied pop culture, showcasing her comedic timing.
















