Actress Michelle Trachtenberg died as a result of complications from diabetes, New York City’s medical examiner says.

The office said in a statement on Wednesday (local time) that it had amended the cause and manner of death for the 39-year-old New York City native following a review of laboratory test results.

Trachtenberg, who was known for Gossip Girl, Buffy The Vampire Slayer and Harriet The Spy, was found unconscious and unresponsive in her luxury apartment tower in Manhattan in February.

Officials at the time said no foul play was suspected, and the medical examiner’s office had listed her death as “undetermined.”

Trachtenberg’s family had objected to an autopsy, which the medical examiner’s office honoured because there was no evidence of criminality.

Her representative didn’t immediately respond to an email seeking comment Wednesday.

The actress was reported to have had a recent liver transplant. Fans on social media had also expressed concern about her health.

In 2024, Trachtenberg took to social media to explain her gaunt appearance.

“Explain to me how I look sick. Did you lose a calendar and not realise I’m not 14? I’m 38. How sad for you to leave such a comment,” she wrote in response to a question about her health.

She subsequently shared a selfie and insisted that she was feeling “happy and healthy”.

“I’ve received several comments recently about my appearance. I have never had plastic surgery. I am happy and healthy. Check yourself haters,” she captioned the image.

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

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 went on to recurring roles on Six Feet Under, Weeds and Gossip Girl, where she played the gang’s scheming nemesis, Georgina Sparks. She was one of the original series’ stars to return for a pair of guest appearances in the 2021 Gossip Girl revival.

Trachtenberg’s later credits included the 2004 teen sex comedy EuroTrip and 2009’s 17 Again with Zac Efron.

-with AAP