Hal Cumpston (born May 29, 1999, in Sydney, New South Wales) is an Australian actor, screenwriter, and producer. He is one of four children of actor Jeremy Cumpston and producer Jessica Brentnall. After graduating from Waverley College in Waverley, New South Wales, he wrote his first screenplay in his early 20s and produced his debut film Bilched – an unusual achievement for someone his age. Cumpston took on his first major international role as Silas, an unusually tall teenager and shy loner, in the spin-off series The Walking Dead: World Be…