Mecklenberg in Nickelodeon’s “The Adventures of Pete & Pete ... On Thursday morning, Trachtenberg’s “Buffy” co-star Sarah ...

Sarah Michelle Gellar is paying tribute to her “Buffy” sister, Michelle Trachtenberg, who died on Feb. 26 at 39 years old.

Sarah Michelle Gellar is paying tribute to her late "Buffy the Vampire Slayer" co-star Michelle Trachtenberg after her tragic ...

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

Trachtenberg's former co-stars are honoring the late actress after she was found dead in New York City earlier this week.

Michelle Trachtenberg, who starred in projects ranging from Harriet the Spy to Buffy the Vampire Slayer to Gossip Girl, has died at age 39.

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

Sarah Michelle Gellar took to her personal Instagram to honor her late Buffy the Vampire Slayer co-star Michelle Trachtenberg ...

Sarah Michelle Gellar took a walk down memory lane in honor of her late friend and co-star Michelle Trachtenberg.

Blake Lively, Sarah Michelle Gellar and others who worked with Michelle Trachtenberg remembered the “loving” and “electric” ...