Mabel Pines is one of the lead characters of the Disney XD (formerly Disney Channel) animated series Gravity Falls. The character is voiced by Kristen Schaal, and designed by the series creator, Alex Hirsch. She is inspired by Hirsch's own twin sister, Ariel Hirsch. Mabel first appeared on the unreleased unnamed pilot created by Hirsch which he used to pitch the show; she then appeared on the first episode "Tourist Trapped".