Arthur

Charlie Hunnam

The Mage

Astrid Bergès-Frisbey

Vortigern

Jude Law

Bedivere

Djimon Hounsou

Uther

Eric Bana

William "Goosefat Bill"

Aidan Gillen

Rubio

Freddie Fox

Tristan "Wet Stick"

Kingsley Ben-Adir

Percival "Percy"

Craig McGinlay

"Kung Fu" George

Tom Wu

Back Lack

Neil Maskell

Maggie

Annabelle Wallis

Young Arthur 2 Yrs

Zac Barker

Young Arthur 2 Yrs

Oliver Barker

Greybeard

Mikael Persbrandt

Mischief John

Geoff Bell

Earl of Mercia

Peter Ferdinando

Igraine

Poppy Delevingne

Catia

Millie Brady

Elsa

Katie McGrath

Lucy

Nicola Wren

Brothel Blackleg

Wil Coban

Syren 1

Lorraine Bruce

Blue

Bleu Landau

Syren 2

Eline Powell

Lady of the Lake

Jacqui Ainsley

Syren 3

Hermione Corfield

Kay

Georgina Campbell

Mordred

Rob Knighton

Mage King

Michael Hadley

Trigger

David Beckham

General 1

Alan Turkington

Jack's Eye

Michael McElhatton

Man In Line

Max Rogers

Axeman

Charlie Rawes

Mike

James Warren

Maria

Ellie Graham

Rob Carpenter

Philip Ball

Merlin

Kamil Lemieszewski

Viking

Kalle Hennie

Henry Faber

Baron 1

Peter Guinness

Baron 2

Mark Umbers

Javan Hirst

Baron 3

Adrian Bouchet

Mark Epstein

Woman 1

Florence Bell

Woman 2

Anna Brooks Beckman

Woman 3

Cordelia Bugeja

Maid 1

Rebecca Calder

Dan Clan Mafia (uncredited)

Lee Nicholas Harris

SPAC / Londinum Fighter (uncredited)

Daniel Stisen

Inn Owner (uncredited)

Guy Ritchie

Noble (uncredited)

Gintare Beinoraviciute

Noble Girl (uncredited)

Alice E. Mayer

Pendragon Soldier (uncredited)

Tom Coulston

Fergal McElherron

Low-Rent Villager (uncredited)

Sarah-Jane De Crespigny

Noblewoman (uncredited)

Claira Watson Parr

Bodhi Fox Keene

Slave Labourer (uncredited)

Alphonso Austin

Yannik Baker

Londinium Fighter (uncredited)

Rudy Barrow

Hugh Robb

Barney Walsh

Londinium Fighter (uncredited)

Joel Bryant

Fighter (uncredited)

Dacio Caballero

Henry W. Smith

Young Mother (uncredited)

Lucy Chappell

Malique Thompson-Dwyer

Knight (uncredited)

Jamie B. Chambers

Cole Wealleans-Watts

James Anderson

Clan Head 1 (uncredited)

Nick Cornwall

Justin Aves

Brothel Punter (uncredited)

Steve Barnett

Nemesis (uncredited)

Steen Young

Nobleman (uncredited)

Karl Farrer

Prostitute (uncredited)

Clea Martin