Actress Michelle Trachtenberg, who gained notoriety for her roles in "Gossip Girl" and "Harriet the Spy," has died, according to reports.

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,

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

Michelle Trachtenberg, born on Oct. 11, 1985, was a Manhattan-born actress who started her career on Nickelodeon at only three years old. Trachtenberg went on to make a name for herself in movies

Actress Michelle Trachtenberg has died, police sources confirmed to multiple entertainment and news publications on Wednesday. Trachtenberg was reportedly found in a New York apartment. The death is not currently being investigated as suspicious,

Friends and costars of Michelle Trachtenberg are remembering the actress with touching tributes after her passing on Wednesday at the age of 39.

One of Michelle Trachtenberg's neighbors, Ariana Rodriguez, said she noticed the actress had become 'svelte' and looked 'less and less like herself in the last few months'

The cause of death for actress Michelle Trachtenberg has been ruled “undetermined” by the New York City Medical Examiner, according to an agency spokesperson.

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

While there is no criminality suspected, the city Medical Examiner couldn’t tell what caused the star’s death from a preliminary exam.

Michelle Trachtenberg was found in her New York City apartment, and the death is not believed to be suspicious, police said.