Michelle Trachtenberg, who appeared in ‘Gossip Girl,’ ‘Buffy the Vampire Slayer,’ found dead

NEW YORK — Actress Michelle Trachtenberg, known for her roles on “Gossip Girl,” “Buffy the Vampire Slayer” and “Harriet the Spy,” was found dead in her New York City apartment on Wednesday, police said. She was 39.

Her death is not believed to be suspicious, sources told ABC News. A source with the New York City Police Department confirmed her death to CNN.

The actress’ mother found her just after 8 a.m. ET, the news organization reported. A cause of death has not been confirmed, Variety reported.

Trachtenberg’s death was first reported by the New York Post.

According to a statement from the NYPD, officers responded to a 911 call where “officers observed a 39-year-old female unconscious and unresponsive,” The Associated Press reported.

Paramedics pronounced her dead at the scene. The New York Medical Examiner is investigating the cause of death, police told the news organization.

Trachtenberg recently underwent a liver transplant and may have been experiencing complications, sources told ABC News.

Trachtenberg began acting as a child, KTLA reported. She played the role of Dawn Summers, the younger, polarizing sister of Sarah Michelle Gellar in 66 episodes of “Buffy the Vampire Slayer,” from 2000 to 2003; and Georgina Sparks in “Gossip Girl.”

Born in New York City on October 11, 1985, Trachtenberg made her television debut in commercials when she was 3, Deadline reported. She then landed a recurring role as Lily Montgomery on the soap opera “All My Children.”

She also starred in Nickelodeon’s “The Adventures of Pete & Pete” and was nominated for a Daytime Emmy for her role in Discovery children’s series “Truth or Scare,” according to Deadline. She landed her breakthrough role as Harriet M. Welsch in the 1996 film “Harriet the Spy.”

After “Buffy” ended its run in 2003, Trachtenberg played Celeste on “Six Feet Under” and guest starred on shows including “House,” “Law & Order: Criminal Intent” and “Weeds,” CNN reported.

Trachtenberg also portrayed Casey Carlyle, the heroine in the 2005 figure-skating movie “Ice Princess,” The New York Times reported. She also had roles in the 2004 film “EuroTrip” and the 2009 comedy “17 Again.”

She most recently appeared in two episodes of Max’s “Gossip Girl” revival, according to CNN.

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