Paramedics pronounced her dead at the scene after she was found “unconscious and unresponsive”. No foul play was suspected. 

Michelle Trachtenberg, a former child star who appeared in the 1996 Harriet The Spy hit movie and went on to co-star in two buzzy millennial-era TV shows – Buffy The Vampire Slayer and Gossip Girl – has died. She was 39.

Police responded to a 911 call shortly after 8am on Wednesday (Feb 26) at a 51-storey luxury apartment tower in Manhattan’s Hell’s Kitchen neighbourhood where officers found Trachtenberg “unconscious and unresponsive”, according to an NYPD statement.

Paramedics pronounced her dead at the scene. No foul play was suspected and the New York Medical Examiner is investigating the cause of death, police said.

“The family requests privacy for their loss,” Trachtenberg’s representative, Gary Mantoosh, said in a statement on Wednesday.

Trachtenberg was eight when she began playing Nona Mecklenberg on Nickelodeon’s The Adventures Of Pete & Pete from 1994 to 1996 and then starred in the title role in the film adaptations of Harriet The Spy and Inspector Gadget, opposite Matthew Broderick.

“Michelle comes off as genuine because she really is a genuine kid. Everyone can identify with her,” said Debby Beece, president of Nickelodeon Movies in 1996.

FILE – Actor Michelle Trachtenberg, left, who portrays Dawn, Buffy’s sister Emmy, playfully spears series producer-creator Joss Whedon, during the taping of the final episode of “Buffy the Vampire Slayer” in Santa Monica, Calif., April…see more

In 2000 Trachtenberg joined the cast of Buffy, playing Dawn Summers, the younger sister of the title character played by Sarah Michelle Gellar between 2000 and 2003.

Trachtenberg thanked Gellar for speaking out against Joss Whedon in 2021, following abuse allegations made against the Buffy showrunner. “I am brave enough now as a 35-year-old woman to repost this,” she wrote on social media, and alluded to “his not appropriate behaviour” she experienced as a teenage actor.

In 2001, she received a Daytime Emmy nomination for hosting Discovery’s Truth Or Scare. Trachtenberg went on to recurring roles on Six Feet Under, Weeds and Gossip Girl, where she played the gang’s scheming nemesis, Georgina Sparks.

FILE – Actors and fellow “Gossip Girl” cast members Michelle Trachtenberg, left, and Blake Lively appear at the 2009 CFDA Fashion Awards in New York, on June 15, 2009. (AP Photo/Evan Agostini, FIle)

For her fan-favourite role, she was nominated as a TV villain at the Teen Choice Award in 2012. “It’s definitely a lot more fun than playing the good girl,” she told Seventeen in 2009. I love the reaction you get. I never understood why some actors don’t want to play villains or evil characters.”

She was one of the original series’ stars to return for a pair of guest appearances in the 2021 Gossip Girl revival.

As if to cement herself in millennial culture, Trachtenberg made a cameo in Fall Out Boy’s music video for This Ain’t A Scene, It’s An Arms Race alongside Seth Green.

Hollywood took to social media to mourn one of their own, one who had made the transition from kid star to teen queen to adult actor. Buffy The Vampire Slayer co-star David Boreanaz said on Instagram it was “so very sad.. horrible news.” Melissa Gilbert, who starred with Trachtenberg in the 1996 film A Holiday For Love, wrote on Instagram: “My heart aches for your family and all those who loved you so.”

Fellow Buffy co-star, Alyson Hannigan, who played Willow in the series, also posted her condolences on Instagram, writing: “I am deeply saddened by the news of Michelle’s passing. She brought a loving energy to the set of Buffy. My thoughts are with Michelle’s family and friends.” 

Trachtenberg’s other credits included Ice Princess in 2005, playing a math prodigy and aspiring figure skater. The AP said it had “a good, though feeble, heart and the best of intentions” and said Trachtenberg was “mining the same nervous twitter from her kid-sister days on Buffy The Vampire Slayer”.

The New York City-born Trachtenberg also appeared in the 2004 teen sex comedy EuroTrip, she co-starred with Zac Efron and Leslie Mann in 2009’s 17 Again and played a murderous stalker and abductor on an episode of Criminal Minds.

For Killing Kennedy, the 2013 film in which she played the wife of Lee Harvey Oswald, around 80 per cent of Trachtenberg’s dialogue was in Russian. She had learned the language from her mother growing up.

Other credits included supporting roles in the films Mysterious Skin in 2004 and Black Christmas in 2006. She also starred on the NBC medical series Mercy (2009–2010) opposite Taylor Schilling. More recently, she hosted the true-crime docuseries Meet, Marry, Murder on Tubi.