Charlie Hunnam Arthur
Annabelle Wallis Maggie
Jude Law Vortigern
Guy Ritchie Director, Producer, Screenplay, Inn Owner (uncredited)
Aidan Gillen William "Goosefat Bill"
Djimon Hounsou Bedivere
Eric Bana Uther Pendragon
Àstrid Bergès-Frisbey The Mage
Freddie Fox Rubio
Mikael Persbrandt Greybeard
Katie McGrath Elsa
Millie Brady Catia
Geoff Bell Mischief John
Kingsley Ben-Adir Tristan "Wet Stick"
Hermione Corfield Syren 3
Georgina Campbell Kay
Peter Guinness Baron 1
Charlie Rawes Axeman
David Beckham Trigger
Eline Powell Syren 2
Neil Maskell Back Lack
Wil Coban Brother Blackleg
Simon Hayes Production Sound Mixer
Akiva Goldsman Producer
Tom Wu "Kung Fu" George
Max Keene Associate Producer, First Assistant Director
Daniel Pemberton Original Music Composer
Peter Ferdinando Earl of Mercia
Michael McElhatton Jack's Eye
Luke Scott Stunts
Nick Cornwall Clan Head 1 (uncredited)
Mark Umbers Baron 2
Jamie B. Chambers Knight (uncredited)
Joby Harold Screenplay, Story, Producer
James Warren Mike
Luke Hull Art Direction
Andrew Banwell Other
Craig McGinlay Percival "Percy"
Daniel Stisen SPAC / Londinum Fighter (uncredited)
Cristian Knight Stunts
David Dobkin Story, Executive Producer
Adrian Bouchet Baron 3
Lee Nicholas Harris Dan Clan Mafia (uncredited)
Elliot Hawkes Stunts
Lucy Chappell Young Mother (uncredited)
Poppy Delevingne Igraine
Lorraine Bruce Syren 1
Rebecca Calder Maid 1
Greg Corke Armorer
Bruce Berman Executive Producer
Steph Lynn Robinson Stereoscopic Coordinator
Stuart Penn CG Supervisor
Lionel Wigram Producer, Screenplay
Joel Bryant Londinium Fighter (uncredited)
Rudy Barrow Londinium Fighter (uncredited)
Loulou Bontemps Set Costumer
Clea Martin Prostitute (uncredited)
Sarah Lochlan Stunts
John Mathieson Director of Photography
Cordelia Bugeja Woman 3
Peter Burgis Foley
Christine Blundell Hair Designer, Makeup Designer
John Marzano Aerial Director of Photography
Steen Young Nemesis (uncredited)
James Boyle Sound Designer
Karl Farrer Nobleman (uncredited)
Olivier Dumont Visual Effects Supervisor
Kiel Figgins Senior Animator
Marc Wolff Aerial Coordinator, Pilot
Chris Lyons Special Effects Makeup Artist
Lillie Jeffrey Casting Associate
Josh Evans Matte Painter