Tributes have already begun pouring out for the amazing character actor.

Beloved actor Clark Middleton has sadly passed away.

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His death was confirmed by his wife, Elissa, today.

Middleton had a very impressive resume...

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Including roles on Twin Peaks, The Path, and The Blacklist.

Middleton had suffered from juvenile rheumatoid arthritis since he was 4 years old.

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And had been open about his struggles.

"At first it distorted my hands."

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"Then the cortisone I had to take made my cheeks fat," he explained.

"At 8, I lost movement in my neck."

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"When I was 15, my hip snapped."

"After an operation, I had to be on crutches."

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"And later, after I broke my leg falling over my dog, on canes."

Middleton even performed a 1997 one-person play called Miracle Mile.

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In which he detailed his struggles with juvenile rheumatoid arthritis.

Alongside his television roles...

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Middleton also enjoyed movie roles in Serendipity, Kill Bill Vol. 2, Sin City, Taking Woodstock and more.

Tributes have begun pouring in for the star.

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Including from past co-star Aaron Paul, who said, "Clark Middleton loved to act more than anyone I have ever met in my life and he was damn good at it. I had the privilege to work with him for many years and became dear friends with him through the process. He loved people and he knew movies. Like nobody I have ever met before."

"He loved movies and TV and was proud to be in this business. He was a fighter and a beautiful one at that. He always kept his head up no matter the circumstances. What a gift it was to be in his presence and learn just a little bit from him. My friend. My beautiful friend."

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"I love you and I miss you. Thank you for showing me what strength really looks like. Thank you for giving it your all no matter what. I hate that I am writing this right now. I don’t know what else to do. Rest In Peace you wonderful man you."

And that's not all.

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The Blacklist creator Jon Bokenkamp also issued an emotional statement.

"I’m heartbroken. Besides being a truly unique and gifted actor, Clark was simply an incredible guy in every way. He was a whip-smart film nut."

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"He loved his work with a passion. And he was insanely generous of spirit … I know his entire family at The Blacklist is devastated by this news. Clark was one of the good ones, and we lost him way too soon."

And that's not all.

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Many fans have offered up words of respect and sadness for the star.

His death was announced by his wife, Elissa.

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"With heavy hearts we announce the passing of a life eminently worthy of celebration: Clark Tinsley Middleton, 63 – beloved actor, writer, director, teacher, hero, husband, beacon, friend."

"Clark transitioned on October 4th as a result of West Nile Virus, for which there is no known cure."

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"Clark was a beautiful soul who spent a lifetime defying limits and advocating for people with disabilities."

West Nile virus is transmitted mainly through mosquitoes.

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It is the leading cause of mosquito-borne disease in the United States.

Clark is survived by his wife Elissa, brother Kirby Middleton and mother Sue Perior.

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The Arthritis Foundation has also set up the Clark Middleton Memorial Fund following his passing.

RIP to the star.

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And tragically, Middleton isn't the only talent we've lost this year...