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.

Actress Michelle Trachtenberg was slated to appear at a benefit screening in Texas next month for her final film before her tragic death at 39, according to reports. The “Gossip Girl” star, who was found dead at her ritzy Manhattan apartment Wednesday morning,

Police officers, responding to a 911 call, found her unresponsive in a Manhattan apartment on Wednesday morning, the authorities said.

Michelle Trachtenberg, the actor best known for "Gossip Girl," "Ice Princess" and "Buffy the Vampire Slayer," died at age 39.