Will Poulter ("Midsommar") has been cast in one of the show's lead roles, reports Variety.
He will join Australian actress Markella Kavenagh in the series. Details about the characters have not yet been revealed.
The series will take place in Middle-Earth, the world created by J.R.R. Tolkien, and will explore new storylines preceding the period in which the "Lord of the Rings" trilogy is set -- the Second Age, the era in which the Rings of Power, including Sauron's One Ring, came into existence.
The show's official Twitter account sent out an image of a map along with the message: "One Ring to rule them all, One Ring to find them, One Ring to bring them all, and in the darkness bind them, In the Land of Mordor where the Shadows lie." as well as the tweet "Welcome to the Second Age."
Poulter has recently been seen in Netflix's "Black Mirror" movie "Bandersnatch" as well as Ari Aster's horror film "Midsommar.”
The "Lord of the Rings" series is being developed by the writing team of JD Payne and Patrick McKay. J.A. Bayona ("Jurassic World: Fallen Kingdom") is set to direct the first two episodes and will executive produce along with Belén Atienza. Writers Gennifer Hutchison ("Breaking Bad"), Jason Cahill ("The Sopranos") and Justin Doble ("Stranger Things") will also serve as executive producers, along with Lindsey Weber, Bruce Richmond, Gene Kelly and Sharon Tal Yguado.
The series will be produced by Amazon Studios in cooperation with the Tolkien Estate and Trust, HarperCollins, and New Line Cinema, a division of Warner Bros. Entertainment.
Production is slated to begin in 2020.