Michelle Trachtenberg’s Family ‘Still Devastated’ Over Actress’ Death

Those closest to Michelle Trachtenberg continue to grieve the actress’ sudden death.

“The whole family is still very much in mourning and still devastated,” a source exclusively shares with Us Weekly.

On February 26, the Gossip Girl star’s death was confirmed by her rep after she was found unconscious inside her New York City apartment. She was 39.

While her cause of death was initially deemed “undetermined,” the New York City Office of Chief Medical Examiner later confirmed to Us on Wednesday, April 16, that Trachtenberg died as a result of complications from diabetes mellitus. Her death was deemed natural.

Related: Everything to Know About Michelle Trachtenberg’s Death, Investigation

Michelle Trachtenberg died in February 2025 at the age of 39. “It is with great sadness to confirm that Michelle Trachtenberg has passed away,” a rep for the actress told Us Weekly in a statement. “The family requests privacy for their loss. There are no further details at this time.” Trachtenberg is survived by parents […]

“Michelle’s family knew what the cause of death was likely to be,” the insider adds. “They were aware of her health issues, so it’s not a surprise.”

Us has reached out to Trachtenberg’s rep for comment.

According to the Mayo Clinic, diabetes mellitus refers to a “group of diseases that affect how the body uses blood sugar,” a.k.a. glucose. Glucose is the brain’s main source of fuel and a key source of energy for cells in the human body.

Last month, a source shared with Us that Trachtenberg’s health had been deteriorating for some time. The insider confirmed that the Harriet the Spy actress had a liver transplant in the months prior to her death.

“She was very open with those close to her about having the transplant,” a friend of Trachtenberg said in March, adding that the late actress “never went into detail.”

Despite her health concerns, Trachtenberg was reportedly working on a big project before her death.

Director Casey Tebo told TMZ in March that the actress had written a screenplay based on the book Toy Monster: The Big, Bad World of Mattel. According to Tebo, it was one of the best screenplays he’d read, and the pair were in talks with a studio to make the potential film a reality.

Since her passing, Trachtenberg has received countless tributes from costars and friends.

Related: Michelle Trachtenberg’s Neighbors Reflect on the Actress’ Final Months

Michelle Trachtenberg was a beloved member of her New York City neighborhood in the months leading up to her death.  Us Weekly confirmed on Wednesday, February 26, that Trachtenberg was found dead inside her Midtown West Side apartment. She was 39 years old.  “Michelle always seemed happy, I never noticed anything off about her at […]

“I loved her very much,” Rosie O’Donnell said about her Harriet the Spy costar. “She struggled the last few years. I wish I could have helped.”

Gossip Girl’s Chace Crawford also honored his coworker with a social media post.

“Michelle was one of a kind,” he wrote via Instagram. “I remember her coming on set for the first time and just absolutely owning it. She was a force of nature and just so so unapologetically funny and magnetic.. remembering those years with a big smile. Just a terrible loss. Love you ❤️.”