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

Cast members of "Buffy the Vampire Slayer," "Gossip Girl" and more are remembering their co-star Michelle Trachtenberg​ after ...

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

Blake Lively, Sarah Michelle Gellar, David Boreanaz, Ed Westwick, Kim Cattrall, Kenan Thompson, Melissa Joan Hart and more ...

Buffy the Vampire Slayer stars including Alyson Hannigan, David Boreanaz and more break silence over 'horrible' death of ...

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

Actor Melissa Gilbert, who acted alongside Trachtenberg in A Holiday for Love, honored the late star on Instagram by sharing ...

Michelle Trachtenberg’s former “Buffy the Vampire Slayer” costar Sarah Michelle Gellar is looking back at their time together ...

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

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

Michelle Trachtenberg underwent a liver transplant shortly before her death at age 39, a source told NBC New York. It’s not known if the “Gossip Girl” actor suffered complications from the transplant.