Hinds' (pictured) casting was revealed earlier this year, when Rory Kinnear and Tanya Moodie also joined the cast. No character descriptions were given at the time.
Hinds was nominated for an Oscar and a BAFTA for his role in Belfast and has also starred in films including Munich, There Will Be Blood, In Bruges and Justice League, and in series including Game of Thrones and Rome.
The Lord of the Rings series, developed by J.D. Payne and Patrick McKay, is set in the Second Age of Middle-earth - thousands of years before the events of the Lord of the Rings films and J.R.R. Tolkien's novels.
The series begins in a time of relative peace and follows an ensemble cast of familiar and new characters as they confront the long-feared return of evil to Middle-earth.
Season two of the mega-budget Prime Video fantasy drama premieres on Thursday, August 29 with three episodes, with episodes airing one each week until the season finale on October 3.
