Police told the Post that Trachtenberg was found "unconscious and unresponsive" by police and was pronounced dead by EMS workers. Her death is not being treated as suspicious, police sources told the outlet,

Michelle Trachtenberg, an actress who starred in “Gossip Girl” and “Harriet the Spy,” was found dead in her luxury Midtown Manhattan apartment early Wednesday, police sources said. Trachtenberg, 39, was found unresponsive by her mother in her apartment near Columbus Circle at 8 a.m.

Michelle Trachtenberg, the actress known for her roles in "Gossip Girl" and in the 1990s hit series "Buffy the Vampire Slayer," has died, according to multiple reports.