Question: are the twins on young sheldon related?
Answer: Young Sheldon revolves around Sheldon (Iain Armitage of Big Little Lies) as he lives with his family in East Texas and attends high school in 1989. ... Lance Barber is George, Sheldon's father; Reagan Revord is Missy, Sheldon's twin sister; and Montana Jordan plays George Jr., Sheldon's older brother.