Mariah Amundsen is the voice of and inspiration for Mariah, who appeared on Gravity Falls via the Make a Wish Foundation.

In the fall of 2013, Mariah Amundsen and Nicolas Isler, another child from the Make a Wish Foundation, toured the offices and hung out with the staff of Gravity Falls.

The two got to look behind the scenes and also got a preview of new episodes. In addition to voicing a character based off of themselves, Mariah pitched ideas for the shows to the writers.[1]



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