Sarah Michelle Gellar shared a throwback photo of her and Nicholas Brendon following the “Buffy the Vampire Slayer†alum's death at age 54.

On Saturday, the actress, who starred as the iconic Buffy Summers on the hit series, took to Instagram to pen a heartfelt goodbye to the actor, who played the lovable Xander Harris.

Sarah Michelle Gellar (pictured here in a cast photo) paid tribute to her "Buffy the Vampire Slayer co-star Nicholas Brendon after his tragic death. Sarah Michelle Gellar pens heartfelt goodbye to ‘Buffy’ co-star Nicholas Brendon after his tragic death
Sarah Michelle Gellar (pictured here in a cast photo) paid tribute to her “Buffy the Vampire Slayer co-star Nicholas Brendon after his tragic death. ©20thCentFox/Courtesy Everett Collection

“‘They'll never know how tough it is to be the one who isn't chosen,’†Gellar began in her Instagram Post on Saturday, quoting Brendon's character. “‘To live so near to the spotlight, and never step in it. But I know. I see more than anybody realizes, because nobody's watching me.’â€

She added, “I saw you Nicky. I know you are at peace, in that big rocking chair in the sky.â€

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