The Gossip Girl family is mourning Michelle Trachtenberg. Chace Crawford, who played Nate Archibald on the CW show, posted a tribute to the late actress, who was found dead in her apartment Wednesday morning.

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

Actress Michelle Trachtenberg, known for roles in “Buffy,” “Harriet the Spy,” and “Gossip Girl,” has been found dead in New York City at the age of 39, according to a police spokesperson. The NYPD responded to a 911 call around 8 a.

Michelle Trachtenberg's credits include performances in 'Harriet The Spy,' 'Mysterious Skin' & 'Buffy The Vampire Slayer'

To honor the late Michelle Trachtenberg, Entertainment Weekly looks back on her most iconic movies and TV shows, from 'Harriet the Spy' to 'Gossip Girl.'

Actress Michelle Trachtenberg has died at the age of 39. Trachtenberg starred in multiple hit TV series, such as “Gossip Girl” and “Buffy the Vampire Slayer.” These are some of Trachtenberg’s more iconic roles.