Michelle Trachtenberg, an actress best known for her roles in "Buffy the Vampire Slayer" and "Gossip Girl," has died at age ...

Michelle Trachtenberg's co-stars and fellow celebrities are speaking out after the "Gossip Girl" and "Harriet the Spy" star was found dead Wednesday.

Blake Lively, who co-starred with Michelle Trachtenberg on the teen drama "Gossip Girl," paid tribute to the late actress on Wednesday.

Georgina was played by the actress Michelle Trachtenberg, who was found dead at 39 in her Manhattan apartment on Wednesday.