Fan Casting A24's gravity falls

Twelve year old twins, Dipper and Mabel thought this would be just another Summer vacation in Gravity Falls, Oregon, with their Grunkle Stan. Little did they know danger lurks around every corner in little Gravity Falls. Meet Dipper, the more mature, nerdy twin, wanting nothing but to figure out the mysteries of the town. And then we have Mabel, the optimistic, humorous twin, only wanting to have fun and fall for boy after boy. With each other by their side, can they figure out the mysteries of the small town?