Sarah Michelle Gellar, Taylor Momsen and Blake Lively are among those paying tribute to Michelle Trachtenberg, who died ...

Gossip Girl star Taylor Momsen said her 'heart was on the floor' as she paid tribute to her close friend Michelle ...

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

The world lost a deeply sensitive and good person in Michelle. May her work and her huge heart be remembered by those who ...

After Michelle Trachtenberg suddenly died Feb. 26, her Gossip Girl costar Taylor Momsen recalled their bond in a ...

Michelle Trachtenberg, known for her memorable roles in Buffy the Vampire Slayer and Gossip Girl, tragically passed away on ...

Following reports of Michelle Trachtenberg's death, the actor's co-stars started posting tributes to her. Here's what they've ...

Blake Lively, Trachtenberg's ”Gossip Girl ... Gossip Girl” co-star Taylor Momsen on Instagram. “Michelle was one of a kind. I remember her coming on set for the first time and just ...

Taylor Momsen and Blake Lively are among those paying tribute to Michelle Trachtenberg, who died Wednesday. Trachtenberg was found in her New York apartment “unconscious and unresponsive ...

FILE - Michelle Trachtenberg appears at the Critics' Choice Television Awards in Beverly Hills, Calif., on June 19, 2014 (Photo by Richard Shotwell/Invision/AP, File) ...