Nicholas Brendon, who played Xander Harris on "Buffy the Vampire Slayer," died March 20 at 54. His family says he passed in his sleep of natural causes.

In 2023, Brendon revealed that he had suffered a heart attack and had been diagnosed with a congenital heart defect. The actor’s cause of death has not been determined.

Nicholas Brendon, star of ‘Buffy the Vampire Slayer’ and ‘Criminal Minds,’ has died. He played Xander Harris for seven years on ‘Buffy.’

Nicholas Brendon, the actor who played Xander Harris on all seven seasons of Buffy the Vampire Slayer has passed away. He was only 54.

Nicholas Brendon, the actor who played Xander Harris on all seven seasons of Buffy the Vampire Slayer has passed away. He was only 54.