Charlie Hunnam

Character: Arthur

Jude Law

Character: Vortigern

Àstrid Bergès-Frisbey

Character: The Mage

Eric Bana

Character: Uther Pendragon

Djimon Hounsou

Character: Bedivere

Aidan Gillen

Character: William "Goosefat Bill"

Kingsley Ben-Adir

Character: Tristan "Wet Stick"

Neil Maskell

Character: Back Lack

Craig McGinlay

Character: Percival "Percy"

Tom Wu

Character: "Kung Fu" George

Freddie Fox

Character: Rubio

Mikael Persbrandt

Character: Greybeard

Peter Ferdinando

Character: Earl of Mercia

Geoff Bell

Character: Mischief John

Annabelle Wallis

Character: Maggie

Katie McGrath

Character: Elsa

Lorraine Bruce

Character: Syren 1

Eline Powell

Character: Syren 2

Hermione Corfield

Character: Syren 3

Bleu Landau

Character: Blue

Poppy Delevingne

Character: Igraine

Millie Brady

Character: Catia

Zac Barker

Character: Young Arthur 2 Yrs

Oliver Barker

Character: Young Arthur 2 Yrs

Nicola Wren

Character: Lucy

Wil Coban

Character: Brother Blackleg

Jacqui Ainsley

Character: Lady of the Lake

Georgina Campbell

Character: Kay

Rob Knighton

Character: Mordred

Michael Hadley

Character: Mage King

David Beckham

Character: Trigger

Alan Turkington

Character: General 1

Michael McElhatton

Character: Jack's Eye

Charlie Rawes

Character: Axeman

James Warren

Character: Mike

Ellie Graham

Character: Maria

Kamil Lemieszewski

Character: Merlin

Kalle Hennie

Character: Viking

Peter Guinness

Character: Baron 1

Mark Umbers

Character: Baron 2

Adrian Bouchet

Character: Baron 3

Florence Bell

Character: Woman 1

Anna Brooks Beckman

Character: Woman 2

Cordelia Bugeja

Character: Woman 3

Rebecca Calder

Character: Maid 1

Lee Nicholas Harris

Character: Dan Clan Mafia (uncredited)

Gintare Beinoraviciute

Character: Noble (uncredited)

Alice E. Mayer

Character: Noble Girl (uncredited)

Claira Watson Parr

Character: Noblewoman (uncredited)

Alphonso Austin

Character: Slave Labourer (uncredited)

Rudy Barrow

Character: Londinium Fighter (uncredited)

Daniel Stisen

Character: SPAC / Londinum Fighter (uncredited)

Joel Bryant

Character: Londinium Fighter (uncredited)

Dacio Caballero

Character: Fighter (uncredited)

Lucy Chappell

Character: Young Mother (uncredited)

Jamie B. Chambers

Character: Knight (uncredited)

Pedro Caxade

Character: Vortigern's Guard (uncredited)

Nick Cornwall

Character: Clan Head 1 (uncredited)

Steve Barnett

Character: Brothel Punter (uncredited)

Guy Ritchie

Character: Inn Owner (uncredited)

Steen Young

Character: Nemesis (uncredited)

Tom Coulston

Character: Pendragon Soldier (uncredited)

Sarah-Jane De Crespigny

Character: Low-Rent Villager (uncredited)

Karl Farrer

Character: Nobleman (uncredited)