They’ll always be the Summers sisters. Sarah Michelle Gellar and Michelle Trachtenberg became close friends while playing Buffy and Dawn Summers, respectively, on “Buffy the Vampire Slayer” — a tight bond that lasted until Trachtenberg’s tragic death at age 39.

Sarah Michelle Gellar is looking back on the memories she shared with her former Buffy the Vampire Slayer co-star Michelle Trachtenberg, both on and off-screen. Just a day after Trachtenberg’s passing in New York City,

Sarah Michelle Gellar paid tribute to the late Michelle Trachtenberg after the actress died at age 39.

Sarah Michelle Gellar took to her personal Instagram to honor her late Buffy the Vampire Slayer co-star Michelle Trachtenberg. Trachtenberg was found dead in her New York City apartment on February 26 at the age of 39.

Gellar's tribute to her late costar echoes a monologue she delivered in the supernatural drama's season 5 finale.

Michelle Trachtenberg’s former “Buffy the Vampire Slayer” costar Sarah Michelle Gellar is looking back at their time together on screen and off, one day after Trachtenberg died in New York City.

Buffy the Vampire Slayer alum Sarah Michelle Gellar reflected on her sweet bond with costar Michelle Trachtenberg after her unexpected death at 39 on Feb. 26.