Michelle Trachtenberg, the actor known for “Gossip Girl,” “Buffy the Vampire Slayer” and “Harriet the Spy” died Wednesday. She was 39. New York City police responding to a call at a residential high-rise building in Manhattan found Trachtenberg unresponsive and emergency medical services pronounced her dead at the scene,

Blake Lively on Wednesday shared a lengthy tribute to her “Gossip Girl” costar Michelle Trachtenberg, who was found dead in her New York City apartment on Wednesday morning. Trachtenberg, also known for her roles in “Buffy the Vampire Slayer” and “Harriet the Spy,

Rosie O’Donnell paid tribute to her former co-star, Michelle Trachtenberg, who was found deadin her New York City apartment on Wednesday. “Heartbreaking,” O’Donnell said in a statement to Us Weekly. “I loved her very much.

Actress Michelle Trachtenberg has died at age 39. The beloved actress was found dead at her apartment in New York City on Wednesday, February 26. The New York Police Department confirmed to People that they responded to a 911 call at 1 Columbus Place around 8 a.

"Gossip Girl" and "Buffy the Vampire Slayer" star Michelle Trachtenberg was found dead in her New York City apartment Wednesday morning, according to reports.

Undetermined can mean either that there was inadequate information to assess how a person died or that the information was conflicting, with equal amounts supporting or negating a specific "manner" of death,

Michelle Trachtenberg’s family has objected to an autopsy, leaving the actor’s cause of death undetermined. The family cited religious reasons, the New York City Office of the Chief Medical Examiner told ABC News.

The cause and manner of Michelle Trachtenberg's death will remain undetermined, according to the New York City Office of the Chief Medical Examiner.

Gellar is honoring her late 'Buffy the Vampire Slayer' costar, who died on Wednesday, February 26, with a powerful quote from the show.

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

Blake Lively, Sarah Michelle Gellar and others who worked with Michelle Trachtenberg remembered the “loving” and “electric” actress, who was found dead in her NYC apartment