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Ice King "Do you know what Ice King means?!"
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Michael Emmet Walsh (March 22, 1935 - March 20, 2024) was an American actor who appeared in over 200 film and television productions. He provided the voice of the Cosmic Owl in all of the Adventure Time episodes the Cosmic Owl appeared in after "Jake the Dog." Before that episode, the Cosmic Owl was voiced by Finn's voice actor, Jeremy Shada.

Walsh passed away on March 19, 2024 from a heart attack three days before his 89th birthday.

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