The British actor recently starred in the horror film 'Midsommar.'. His other credits include Kathryn Bigelow's 'Detroit' and Leonardo DiCaprio's 'The Revenant.'. The series will take place thousands of years before the events in 'The Fellowship of the Ring' films. 'Jurassic Park: Fallen Kingdom' director J.A. Bayona will helm the first two episodes. It has also been rumored that the program's budget will reach nearly $1 billion. This would easily make it the most expensive series ever made. Not much is known about the show from Amazon, who did not comment on Poulter's casting. Production is set to begin sometime next year.