Michelle Trachtenberg’s Official Cause of Death Revealed: Complications from Diabetes

Michelle Trachtenberg, beloved for her roles in "Buffy the Vampire Slayer" and "Gossip Girl," has had her official cause of death confirmed as complications from diabetes, according to the New York City Office of Chief Medical Examiner. Authorities stated Wednesday that the 39-year-old actress died of natural causes tied to diabetes mellitus, after a review of laboratory test results.

Initially, her cause of death had been listed as "undetermined," but the new findings have brought clarity. Trachtenberg was found unresponsive in her Manhattan apartment on February 26. Her family chose not to pursue an autopsy, and the medical examiner agreed, as there was no suspicion of foul play.

Trachtenberg’s passing sent shockwaves through Hollywood, with tributes pouring in from stars like Blake Lively and Rosie O'Donnell. It’s a sobering reminder that chronic illnesses like diabetes can be quietly devastating—even for those who seem larger than life on screen.

Starting her career on Nickelodeon's "The Adventures of Pete and Pete," Trachtenberg made a splash in 1996 as the title character in "Harriet the Spy." She later became a household name as Dawn Summers on "Buffy the Vampire Slayer," joining the cast in the show's fifth season. Her friendship with Sarah Michelle Gellar began even earlier, when they worked together on "All My Children" in 1994—and the two kept in touch through their Hollywood ascents.

Beyond the world of vampires and Upper East Side schemers, Trachtenberg also starred in "The Ice Princess" and the cult favorite "EuroTrip." She was a versatile presence in every project she touched, and her absence is already being felt across the industry.