straight-to-series order in October 2019. It is being eyed for a 2022 premiere and stars Olivia Cooke, Matt Smith and Emma D'Arcy.Just last week, news broke that HBO was developing another prequel, based on Martin's fantasy novellas. HBO passed on its other prequel, which had shot a pilot led by Naomi Watts. For more on , watch below.To stay up to date on breaking TV news, sign up for ET's daily newsletter.