Stan Kirsch, one of the stars of the syndicated fantasy drama “Highlander: The Series,” has died at the age of 51.

The news was announced on the Facebook page for the acting studio that Kirsch founded with his wife. “Dear friends,” the post read. “We tragically lost our beloved Stan Kirsch on January 11th. We will be closed for the next 2 weeks as we process and grieve. He was so loved and we are all just devastated. Thank you for your understanding and respecting our privacy during this incredibly difficult time.”

The Los Angeles County medical examiner’s office ruled the actor’s death a suicide.

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Kirsch starred on “Highlander: The Series,” a syndicated TV follow-up to the 1986 film of the same name, for five seasons. He played Richie Ryan, a fast-talking petty thief turned Immortal. The character was killed off the show before its sixth and final season in 1997.

The official “Highlander” Facebook page posted a tribute to Kirsch on Sunday, remembering the actor for his “sense of humor, kindness and youthful enthusiasm.”

“Beyond ‘Highlander: The Series,’ Stan Kirsch was an accomplished acting coach. We have heard first-hand testimonials from many of his students; all of them having considered Stan an incredible teacher and a gift of a human being,” the post read. “Every time we had the opportunity to catch up with Stan, he was nothing but kind, thoughtful and sincere. He was a warm presence that will be missed.”

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Kirsch’s other credits include guest appearances on “JAG,” “Family Law” and “Friends.”