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

Michelle Trachtenberg, the actress who first captured audiences as a child star in Harriet the Spy before making her mark on ...

I will live… for you," she wrote, putting a twist on a beloved "Buffy" quote. In this Oct. 12, 2004 file photo, Michelle Trachtenberg, left, and Sarah Michelle Gellar pose at the premiere of ...