News of Michelle Trachtenberg's death prompted tributes from her friends and former "Buffy," "Harriet the Spy," and "Gossip ...

Nicholas Brendon, Alyson Hannigan, Charisma Carpenter, and others also paid tribute to their former costar after her tragic ...

Blake Lively and Alyson Hannigan are among the former "Gossip Girl" and "Buffy" actors mourning the death of their one-time ...

Nicholas Brendon and Alyson Hannigan has shared emotional tributes to their late Buffy the Vampire Slayer co-star Michelle ...

Cast members from Buffy the Vampire Slayer, Gossip Girl and more paid tribute to the actress.

Sarah Michelle Gellar mourned the death of “Buffy the Vampire Slayer" co-star Michelle Trachtenberg in an Instagram post.

Friends and costars of Michelle Trachtenberg are remembering the actress with touching tributes after her passing on ...

Actress Sarah Michelle Gellar has broken her silence on her Buffy the Vampire Slayer costar Michelle Trachtenberg's death.

Members of the 'Buffy The Vampire Slayer' cast have paid tribute to "little sister" Michelle Trachtenberg after her death ...

Blake Lively has paid a touching tribute to her former Gossip Girl co-star Michelle Trachtenberg, who tragically died at the ...