George Coe, an original member of the Saturday Night Live cast, died Saturday following a long illness, Variety reports. He was 86.

Though Coe was only credited in his first episode of SNL as one of the “Not Ready for Prime Time Players” — what the SNL cast was called during the show’s first five seasons — he appeared several times during the first season.

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His best-known film appearance was in the Oscar-winning Kramer vs. Kramer in 1979, though he went on to make a number of film and TV appearances during his lengthy career.

His TV appearances include credits for Gilmore Girls, Smallville, The West Wing, Curb Your Enthusiasm, Supernatural, Grey’s Anatomy and more. Most recently, Coe did voice work for The Legend of Korra, Archer and Star Wars: The Clone Wars.

Coe also starred in and co-directed The Dove, an Oscar-nominated short film released in 1968 which parodied the works of Swedish director Ingmar Bergman.

An outspoken advocate for the rights of Screen Actors Guild members, Coe “cared deeply about making things better for actors,” wrote Wil Wheaton on Twitter following the news of Coe’s death.