Michelle Trachtenberg, the actress best known for her roles as Dawn Summers on Buffy the Vampire Slayer and Georgina Sparks on Gossip Girl, has died. She was 39. Trachtenberg was found unresponsive in her New York City apartment early Wednesday morning,

Michelle Trachtenberg, the actress who rose to fame as a precocious child star in “Harriet the Spy” and went on to have memorable roles on TV shows including “Gossip Girl,” has died, according to the New York City police.

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.