Michelle Trachtenberg’s cause of death confirmed: Family’s decision delayed answers until now

Beloved actress Michelle Trachtenberg, known for roles in Buffy the Vampire Slayer and Gossip Girl, died in February at 39. Her family declined an autopsy due to religious beliefs — but now, a toxicology report confirms the cause: diabetes complications.

Michelle Trachtenberg was a familiar face to many who grew up in the early 2000s. As Dawn Summers in Buffy the Vampire Slayer and Georgina Sparks in Gossip Girl, she played characters who were smart, complex, and unforgettable. Off-screen, however, Michelle had reportedly been struggling with serious health issues before her untimely death.

In the months leading up to February, sources say Michelle was battling emotional and physical challenges. One friend told People magazine that Michelle had become open about how much she was suffering. “She was really, really sick,” the source said, adding that she appeared “gaunt” and “very thin.”

Despite fan concern over her appearance, Michelle tried to reassure followers on social media earlier this year. In January, she responded to rumors by saying she was “happy and healthy,” pushing back against speculation and denying any cosmetic surgery.

Family declined autopsy on religious grounds

When Michelle was found “unconscious and unresponsive” in her New York apartment, fans expected an autopsy to provide clarity. But her family, who follow Orthodox Judaism, requested that no post-mortem exam be performed. Their faith traditionally discourages autopsies unless absolutely necessary.

Since there was no sign of foul play, the New York City medical examiner respected the family’s wishes. That meant the public was left with more questions than answers — until now.

Official cause of death – Diabetes complications

On April 16, a spokesperson from the New York City Office of Chief Medical Examiner confirmed that Michelle Trachtenberg died from complications related to diabetes mellitus, a chronic illness that affects how the body processes sugar.

The report noted that this finding was based on toxicology results — which can be done without performing a full autopsy. The spokesperson clarified that her death was classified as natural.

Diabetes can cause serious problems when left unmanaged, including damage to the liver, kidneys, heart, and other organs. In Michelle’s case, it appears that the disease, combined with other health struggles like a recent liver transplant, became too much for her body to handle.

The confirmation of Michelle’s cause of death brought some closure — but the pain of losing her is still fresh for many fans and friends.

Blake Lively, her Gossip Girl co-star, remembered Michelle as someone with “electricity” in her presence. Sharing a photo of them together, she wrote, “Everything she did, she did 200%.”

Sarah Michelle Gellar, who played her on-screen sister in Buffy, shared emotional throwback photos and quoted a heart-wrenching line from the show:
“The hardest thing in this world is to live in it. I will be brave. I will live… for you.” Her tribute ended with broken heart emojis and a key: 💔💔💔🗝️

Rosie O’Donnell, who acted alongside Michelle in Harriet the Spy, spoke to People and shared her heartbreak: “I loved her very much. She struggled the last few years. I wish I could have helped.”

Michelle’s story is a painful reminder of how chronic illness — especially when combined with emotional stress — can silently take a toll, even on those who seem to be managing.

Though her life ended far too soon, Michelle Trachtenberg leaves behind a powerful legacy — not just through her work on screen, but in the hearts of fans who grew up watching her. She brought strong, vulnerable, and funny characters to life and helped shape a generation of television.

Now, with the truth finally known, perhaps her family and fans can begin to heal.

Rest in peace, Michelle. You were loved, and you will be missed.