Blake Lively, Sarah Michelle Gellar and other Hollywood figures are paying tribute to Michelle Trachtenberg, who died at 39.

On Thursday morning, Trachtenberg’s “Buffy” co-star Sarah Michelle Gellar shared an Instagram post ... and a very talented person.” Blake Lively remembered her “Gossip Girl” costar as a “deeply sensitive and good person.”

Sarah Michelle Gellar, 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,” according to an NYPD statement.

Michelle Trachtenberg, known for her memorable roles in Buffy the Vampire Slayer and Gossip Girl, tragically passed away on February 26, 2025, at the age of 39. As news of her sudden death spread, tributes from her co-stars,

Actor Michelle Trachtenberg's death at age 39 sparked many tributes from her former co-stars and friends. Here are some of the heartfelt posts.

Sarah Michelle Gellar, who played Michelle’s older sister and lead in Buffy the Vampire Slayer, shared a quote from the show to say her final goodbye to her costar that turned into family. “Michelle, listen to me. Listen. I love you. I will always love ...

Buffy the Vampire Slayer" star Sarah Michelle ... herself.” — Blake Lively, Trachtenberg's ”Gossip Girl" co-star, on Instagram. “Rest in peace sweet Michelle” — Kim Cattrall on Instagram.