India, March 21 -- Nicholas Brendon, actor best known for his role as Xander Harris on "Buffy the Vampire Slayer," passed away Friday at the age of 54.

Brendon died in his sleep of natural causes, his family confirmed.

"We are heartbroken to share the passing of our brother and son, Nicholas Brendon," his family said in a statement to The Hollywood Reporter. "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, and endlessly driven to create."

"Those who truly knew him u...