Over the past month, Trachtenberg has posted a few photos on Instagram, including a few throwbacks. Her most recent selfie appears to have been uploaded on Wednesday, February 12.

Actress Michelle Trachtenberg’s death was ruled “undetermined” Thursday morning after her family objected to an autopsy, according to a spokeswoman for the city medical examiner’s office and

Michelle Trachtenberg was in a long-term relationship with her boyfriend, Jay Cohen, at the time of her death in February 2025. In October 2020, sources exclusively confirmed to Us Weekly that Trachtenberg had been dating her talent agent, Cohen, for “over a year.”

Michelle Trachtenberg's death Wednesday left her former co-stars like Blake Lively, Rosie O'Donnell, Melissa Gilbert and Kenan Thompson shocked and saddened.

Nearly 30 years after starring in Harriet the Spy with Trachtenberg, Rosie O’Donnell mourned her passing in a statement to Us Weekly. “Heartbreaking,” she said. “I loved her very much. She struggled the last few years. I wish I could have helped.”

Several actors, including Blake Lively and Melissa Joan Hart, have paid tribute to Trachtenberg after she died on Wednesday.

Michelle Trachtenberg's co-stars and fellow celebrities are speaking out after the "Gossip Girl" and "Harriet the Spy" star was found dead Wednesday.