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Jon Stewart is an American comedian, writer, producer, director, actor, media critic, and former television host. He voiced Judge Kitty Kitty Meow Meow Face-Shwartstein in the Gravity Falls episode "Weirdmageddon 2: Escape From Reality."
- He was invited to be a guest star for the show after a shout-out he made concerning the series. Later, Alex Hirsch found out that Stewart was a fan of Gravity Falls while attending a live taping of The Daily Show.
- He enjoys watching Gravity Falls with his kids and even does a Grunkle Stan impression around his house.
- Hirsch said on an AMA that he would most want Stewart as a guest star a few years prior to his appearance on the show.