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

Former child star Michelle Trachtenberg, known for Buffy and Gossip Girl, has died at 39; cause under investigation.

Michelle Trachtenberg, known for her roles in 'Harriet the Spy,' 'Buffy the Vampire Slayer,' and 'Gossip Girl,' has died at ...

Blake Lively, Rosie O’Donnell lead tributes to Gossip Girl and Harriet the Spy star - Kim Cattrall, Kenan Thompson and ...