Iain De Caestecker

Arthur Pendragon

Stuart Campbell

Derfel Cadarn

Ellie James

Nimue

Steven Elder

Bishop Bedwin

Valene Kane

Morgan

Simon Merrells

Gundleus

Ken Nwosu

Sagramor

Cy Foxx

Dumonian Leader

Jordan Dark

Young Derfel

Sifiso Mazibuko

Hywel

Lucy Allix

Young Nimue

Bryony Morgan

Tattooist

Grace Ackary

Norwenna

Ene Frost

Ligessac

Rob Murphy

Dumnonian Guard

Jordan Alexandra

Guinevere

Eddie Marsan

Uther

Olumide Olorunfemi

Lunete

Billy Postlethwaite

Cadwys

Daniel Ings

Owain

Nathaniel Martello-White

Merlin

Tatjana Nardone

Ladwys

Andrew Gower

Sansum

Matt Mella

Lanval

Aneirin Hughes

Gorfydd

Charlie Duncan

Ralla

Sagar Arya

Tewdric

Gwïon Morris Jones

Culwyn

Lily Williams

Younger Nimue

Charlotte Workman

Sylvia

Faith Delaney

Sarlinna

San Shella

Lohilt

Emily John

Ceinwyn

Gabriel Tierney

Tristan

Keith Dunphy

Raince

Angus Salisbury

Bowen

Craig Parkinson

Aelle

Rhodri Miles

Brother John

Miranda Shamiso

Wenhaver

Kevin Metcalfe

Siluarian Warrior

Joshua Frater-Loughlin

Bossk

Oliver Morgan-Thomas

Dumnonian Warrior

Ned Dennehy

Malldyn

Frank Bourke

Ultan

Carl Andersson

Wlenca