Charlie Hunnam Arthur
Aidan Gillen William "Goosefat Bill"
Guy Ritchie Producer, Screenplay, Inn Owner (uncredited), Director
Jude Law Vortigern
Annabelle Wallis Maggie
Eric Bana Uther Pendragon
Katie McGrath Elsa
Djimon Hounsou Bedivere
Freddie Fox Rubio
David Beckham Trigger
Kingsley Ben-Adir Tristan "Wet Stick"
Millie Brady Catia
Georgina Campbell Kay
Marc Wolff Pilot, Aerial Coordinator
Hermione Corfield Syren 3
Geoff Bell Mischief John
Eline Powell Syren 2
Mikael Persbrandt Greybeard
Àstrid Bergès-Frisbey The Mage
Neil Maskell Back Lack
Peter Guinness Baron 1
Michael McElhatton Jack's Eye
Rebecca Calder Maid 1
Mark Umbers Baron 2
Akiva Goldsman Producer
Daniel Stisen SPAC / Londinum Fighter (uncredited)
Charlie Rawes Axeman
Poppy Delevingne Igraine
Nick Cornwall Clan Head 1 (uncredited)
Loulou Bontemps Set Costumer
Cordelia Bugeja Woman 3
David Dobkin Story, Executive Producer
Joby Harold Producer, Story, Screenplay
Adrian Bouchet Baron 3
Tom Wu "Kung Fu" George
Tina Jones Set Decoration
Luke Scott Stunts
Peter Ferdinando Earl of Mercia
Ben Shepherd Visual Effects
Lee Nicholas Harris Dan Clan Mafia (uncredited)
Cristian Knight Stunts
Chuck Finch Gaffer
Daniel Pemberton Original Music Composer
Annabel Wood Stunt Double
Wil Coban Brother Blackleg
Zoe Freed Foley
John Mathieson Director of Photography
Steen Young Nemesis (uncredited)
Gemma Jackson Production Design
Gintare Beinoraviciute Noble (uncredited)
Michael Byrch Stunts
Pete Ford Stunts
George Kirby Stunts
Olivier Dumont Visual Effects Supervisor
Chris Burdon Sound Re-Recording Mixer
Elliot Hawkes Stunts
Sue Harding Foley
Flora Moody Makeup Artist
Sarah Lochlan Stunts
Florence Bell Woman 1
Jonathan Fawkner Visual Effects Supervisor
Lucy Chappell Young Mother (uncredited)
Max Keene Associate Producer, First Assistant Director
Rob Bliss Concept Artist
Bruce Berman Executive Producer
Sol Saihati Lighting Technician
Andrew Stirk Sound Re-Recording Mixer
Claire Matthews Makeup Artist
Andrew Palmer Art Direction
Jamie B. Chambers Knight (uncredited)
Steven Mnuchin Executive Producer
James Boyle Sound Designer