Fan Casting Mabel Pines in Return to the Falls: Gravity Falls Live Action

Mable is seventeen and is about to start senior year, with her twin brother Dipper. She is seen at immature because she has a pet pig, wears kid sweaters, and is still boy crazy. So Dipper acts like he doesn't know her most of the time. When their uncle's Stand and Ford come to tell them Bill has returned, it's up to Dipper and Mable to stop him