Charlie Hunnam (Pacific Rim) stars as the titular head of the Round Table, with Àstrid Bergès-Frisbey (Pirates Of The Caribbean: On Stranger Tides) as Guinevere, Eric Bana (Lone Survivor) as Arthur's father, Uther Pendragon, while Ritchie's old Sherlock Holmes collaborator Jude Law is the villainous Vortigern and Djimon Hounsou (Blood Diamond) as Sir Bedivere, one of Uther's old comrades who takes Arthur under his wing.
Edge Of Tomorrow (2014) producer Joby Harold has written a script that finds a young Arthur as a streetwise type running the back alleys of Londonium, unaware of his royal destiny. Until, that is, he somehow grasps hold of the sword Excalibur, and finds himself challenged by its power. He joins forces with the resistance, meets Guinevere and has to learn to master the sword while battling his demons as well as the tyrannical Vortigern. Can he avenge his murdered parents and claim his rightful place on the throne? If the film is a success, Harold and Ritchie have plans for a six-film franchise spun from the stories of Arthur and co.
With Aidan Gillen (Game Of Thrones) and Mikael Persbrandt (The Hobbit: The Desolation Of Smaug) also aboard, King Arthur: Legend Of The Sword will arrive in cinemas 12 May.