Sarah Michelle Gellar, Taylor Momsen and Blake Lively are among those paying tribute to Michelle Trachtenberg, who died ...

Michelle Trachtenberg, the actor known for “Gossip Girl,” “Buffy the Vampire Slayer” and “Harriet the Spy” died Wednesday.

Michelle Trachtenberg, born on Oct. 11, 1985, was a Manhattan-born actress who started her career on Nickelodeon at only ...

Actress Michelle Trachtenberg poses for a portrait Jan. 19, 2009, during the Sundance Film Festival in Park City, Utah.

Actress Michelle Trachtenberg, known for her roles in "Harriet the Spy" and "Gossip Girl," has died. She was 39.

Michelle Trachtenberg, the actor known for "Gossip Girl," "Buffy the Vampire Slayer" and "Harriet the Spy" died Wednesday.

(NEXSTAR) – Actress Michelle Trachtenberg has died, police sources confirmed to the New York Post and ABC on Wednesday. Trachtenberg was reportedly found in a New York apartment. The death is not ...

on Jan. 9, 2016. (Photo by Rich Fury/Invision/AP, File) FILE - Actress Michelle Trachtenberg poses for a portrait during the Sundance Film Festival in Park City, Utah, on Jan. 19, 2009.

Actress Michelle Trachtenberg has died, New York police confirmed Wednesday. Trachtenberg was found unconscious and unresponsive in a Manhattan apartment at 8 a.m. Wednesday, police said.