She went on to appear in EuroTrip, Six Feet Under, Ice Princess, 17 Again opposite Zac Efron and the late Matthew Perry, Mercy, Weeds, Gossip Girl, Guidance and more. Her last credited role was in 2022, when she reprised her character Georgina Sparks in the Gossip Girl reboot.

Michelle Trachtenberg died at age 39 on Feb. 26 and her cause of death has been labeled "undetermined" as her family objected to autopsy. The actress reportedly may have had complications from a liver transplant and a medical doctors talks about the many reasons for a liver transplant.

Whenever we spoke, there was something medically wrong,” the pal said of the “Gossip Girl” star’s health “curveballs.”

Michelle Trachtenberg had written an 'incredible' screenplay based on Jerry Oppenheim's 'Toy Monster,' according to producer Casey Tebo, but he says studios overlooked the star's talent for writing.

Michelle Trachtenberg was in poor health before she died at age 39 on Feb. 26. Several sources spoke to Us Weekly about the “Gossip Girl” alum’s final days after she got a liver transplant, which may have contributed to her death.

Before her death at 39, Michelle Trachtenberg wrote a screenplay titled, 'Toy Monster.' Producer Casey Tebo exclusively tells PEOPLE that studio executives struggled to see the late actress for anything beyond her iconic television roles,

Trachtenberg had a decades-long career, starring in a slew of iconic roles, including Dawn Summers on “Buffy the Vampire Slayer,” Georgina Sparks on “Gossip Girl,” and Casey Carlyle in the 2005 film “Ice Princess.” Most notably, perhaps, she starred in 1996’s “Harriet the Spy” alongside Rosie O’Donnell.

Academy Awards took place Sunday in Los Angeles, where several late movie stars were remembered by their grieving peers.

Michelle Trachtenberg's cause of death was ruled "undetermined" by the Office of Chief Medical Examiner in New York City, Fox News Digital confirmed.

Sarah Michelle Gellar is focusing on her physical and mental well-being while mourning the loss of her former costar Michelle Trachtenberg. “It’s true what they say … girlfriends and exercise are good for your mental health,

The "Gossip Girl" and "Harriet the Spy" alum, who rose to fame as a child star, was found dead in New York City on Wednesday, according to police.

Cast members of "Buffy the Vampire Slayer," "Gossip Girl" and more are remembering their co-star Michelle Trachtenberg​ after the news of her death.