BREAKING: ‘Gossip Girl’ star Michelle Trachtenberg found dead at 39 in New York City

She was found by her mother at approximately 8 am on Wednesday at One Columbus Place, a high-rise apartment building near Central Park South in Manhattan.

Trachtenberg had recently undergone a liver transplant, according to sources. Her death is not being treated as suspicious.

In recent months, she had posted photos on Instagram where she appeared noticeably thinner, leading some followers to comment on her health. She previously addressed concerns in January of last year, stating that she was “happy and healthy” and denying rumors of plastic surgery.

Born in New York City on October 11, 1985, Trachtenberg began her acting career as a child. One of her first credited roles was on the Nickelodeon series The Adventures of Pete & Pete, where she played Nona F. Mecklenberg.

This is a breaking news story. Refresh for updates.