Pattinson will take on the role of The Dauphin with Mendelsohn playing King Henry IV.
The King stars Timothée Chalamet, Sean Harris (Mission: Impossible – Rogue Nation, Macbeth), Ben Mendelsohn (Ready Player One, Bloodline), Robert Pattinson (Good Time, The Lost City of Z), Lily-Rose Depp (The Summoning, The Dancer), Tom Glynn-Carney (Dunkirk) and Thomasin Harcourt McKenzie (Leave No Trace).
Academy Award-winning Plan B will produce along with Porchlight Films’ Liz Watts (Animal Kingdom, The Rover), Edgerton and Michôd.
Cameras are rolling in the UK on the production which is expected to be released on the streaming service in 2019.