Aidan Gillen William "Goosefat Bill"
Annabelle Wallis Maggie
Jude Law Vortigern
Charlie Hunnam Arthur
Eric Bana Uther Pendragon
Djimon Hounsou Bedivere
Guy Ritchie Inn Owner (uncredited), Director, Producer, Screenplay
Katie McGrath Elsa
Viktor Petrov Director of Previsualization
Georgina Campbell Kay
Millie Brady Catia
Eline Powell Syren 2
Kingsley Ben-Adir Tristan "Wet Stick"
Freddie Fox Rubio
Hermione Corfield Syren 3
Akiva Goldsman Producer
Àstrid Bergès-Frisbey The Mage
Christian Kaestner Visual Effects Supervisor
David Beckham Trigger
Michael McElhatton Jack's Eye
Mikael Persbrandt Greybeard
Cristian Knight Stunts
Geoff Bell Mischief John
Flora Moody Makeup Artist
David Dobkin Story, Executive Producer
Neil Maskell Back Lack
Peter Ferdinando Earl of Mercia
Tom Wu "Kung Fu" George
Joby Harold Screenplay, Story, Producer
Rebecca Calder Maid 1
Bruce Berman Executive Producer
Lionel Wigram Producer, Screenplay
Charlie Rawes Axeman
Peter Guinness Baron 1
Adrian Bouchet Baron 3
Nathaniel De'Lineadeus Special Effects Makeup Artist
Mark Umbers Baron 2
Daniel Pemberton Original Music Composer
Poppy Delevingne Igraine
Tina Jones Set Decoration
Lee Nicholas Harris Dan Clan Mafia (uncredited)
Reg Poerscout-Edgerton Casting
Gintare Beinoraviciute Noble (uncredited)
Daniel Stisen SPAC / Londinum Fighter (uncredited)
Chris Burdon Sound Re-Recording Mixer
Sarah Lochlan Stunts
John Mathieson Director of Photography
Stuart Penn CG Supervisor
Jonathan Fawkner Visual Effects Supervisor
Simon Hayes Production Sound Mixer
Chris Lyons Special Effects Makeup Artist
George Kirby Stunts
Cordelia Bugeja Woman 3
Pete Ford Stunts
James Warren Mike
Wil Coban Brother Blackleg
Oliver Carroll Art Direction
Chuck Finch Gaffer
Annabel Wood Stunt Double
Peter Burgis Foley
Anthony Caron-Delion Art Direction
Rob Bliss Concept Artist
Darren Tubby Draughtsman
Zoe Freed Foley
Darrell Warner Costume Illustrator
Cali Nelle Stunt Double
Craig McGinlay Percival "Percy"
Elliot Hawkes Stunts
Luke Scott Stunts
Nick Davis VFX Supervisor
Alan Turkington General 1
Lucy Chappell Young Mother (uncredited)