Trachtenberg, who co-starred with Gellar on the hit TV series, was found dead in her apartment on Tuesday. She was 39.

Sarah Michelle Gellar is remembering her late friend Shannen Doherty while also mourning the death of Michelle Trachtenberg.

Gellar and Trachtenberg played sisters for three seasons of the hit series 'Buffy the Vampire Slayer,' and remained close for ...

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 ...

Trachtenberg was found in her New York apartment “unconscious and unresponsive,” according to an NYPD statement. She was 39.

Michelle Trachetenberg's cause and manner of death will remain undetermined after her family objected to having an autopsy ...

Michelle Trachtenberg's former "Buffy the Vampire Slayer" costar Sarah Michelle Gellar is looking back at their time together ...

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

Buffy the Vampire Slayer star Seth Green has spoken out about the hit show's upcoming revival and the possibility of an ...

Michelle Trachtenberg was not interested in wading into the legal waters surrounding her Gossip Girl costar Blake Lively in ...

Michelle Trachtenberg's cause of death remains undetermined, but a source reveals she recently had a liver transplant.