According to Deadline Michelle Trachtenberg (Buffy the Vampire Slayer, Gossip Girl) has passed away at the age of 39, with her cause of death remaining undetermined. The New York City Office of the Chief Medical Examiner stated that no autopsy would be conducted due to religious reasons. Authorities responded to a 911 call early Wednesday morning at a luxury residential tower in Midtown Manhattan, where Trachtenberg was found unresponsive and later pronounced dead at the scene.

Officials have ruled out foul play or criminal activity, meaning the medical examiner did not override the family’s request. Deadline reports that Trachtenberg had recently undergone a liver transplant and may have suffered complications. A family spokesperson confirmed her passing in a statement.

“It is with great sadness to confirm that Michelle Trachtenberg has passed away. The family requests privacy for their loss. There are no further details at this time.”

Trachtenberg’s career spanned decades, beginning at age three in commercials before securing a recurring role on All My Children. Deadline notes that she gained recognition in Nickelodeon’s The Adventures of Pete & Pete and later earned a Daytime Emmy nomination for Truth or Scare. Her breakthrough role came in 1996 when she starred as Harriet M. Welsch in Harriet the Spy, based on the classic children’s novel.

In 2000, Trachtenberg joined Buffy the Vampire Slayer as Dawn Summers, a role that solidified her place in pop culture. Deadline highlights her later success in the 2004 comedy EuroTrip and Disney’s Ice Princess. In 2008, she became a fan-favorite as Georgina Sparks in Gossip Girl, known for her unpredictable and manipulative nature. She also starred in 17 Again alongside Zac Efron and Matthew Perry.

Beyond live-action roles, Trachtenberg built a diverse career lending her voice to animated projects such as Robot Chicken, Human Kind Of, and a few DC animated films. She also appeared in House, Weeds, NCIS: Los Angeles, and Sleepy Hollow. She most recently reprised her role in Max’s Gossip Girl sequel series.

As Deadline reports, the entertainment industry is mourning the loss of an actress whose work resonated across multiple generations. While the exact circumstances of her passing remain unclear, Michelle Trachtenberg’s legacy in television and film will endure.