Peter Tork of The Monkees has died at age 77. The Washington Post reports that his sister, Anne Thorkelson, confirmed the news and that he had been battling a rare form of cancer, adenoid cystic carcinoma, which affected his tongue.

Born Peter Halsten Thorkelson, Tork played The Monkees' bassist, the self-described "dummy" of the group on the TV musical sitcom, and while the four members were not originally allowed to play on Monkees records, he was a talented musician who came up through the Greenwich Village folk scene. He did eventually play on Monkees records, including the piano intro on "Daydream Believer," and he co-wrote "For Pete's Sake," which was the closing credits theme on the second season of the show.

Rest in peace, Peter.

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