United Kingdom, March 21 -- Buffy the Vampire Slayer actor Nicholas Brendon has died at the age of 54.

The star, who was known for his portrayal of Xander Harris in the supernatural horror TV series, passed away "in his sleep of natural causes" on Friday (20.03.26).

In a statement shared on Nicholas' Instagram page, his family wrote: "We are heartbroken to share the passing of our brother and son, Nicholas Brendon. He passed in his sleep of natural causes.

"Most people know Nicky for his work as an actor and for the characters he brought to life over the years. In recent years Nicky has found his passion in painting and art.

"Nicky loved to share his enthusiastic talent with his family, friends and fans. He was passionate, sensitive a...