Nicholas Brendon, the actor best known for playing Xander Harris on the late-90s cult classic tv show “Buffy the Vampire Slayer,” has died at age 54. His family announced he passed peacefully in his sleep on March 20, 2026. In recent years, Brendon was plagued with medical health issues. By 2023, he had a heart attack and was diagnosed with a congenital heart defect and cauda equina syndrome, the latter led to several spinal surgeries. We are heartbroken to share the passing of our brother and son, Nicholas Brendon. He passed in his sleep of natural causes. pic.twitter.com/DqVQfVL8Xk — Nicholas Brendon (@NicholasBrendon) March 21, 2026 Brendon’s portrayal of Xander — the everyman of the Sunnydale crew, who navigated a world of vampires and slayers armed only with wit, loyalty, and heart — earned him a devoted following and a lasting place in television history. Costars quickly paid tribute on social media. Sarah Michelle Gellar, who played Buffy, wrote a heartfelt post invoking one of Xander’s comforting lines, a nod to the actor’s warmth both on …