King Uther

Eddie Marsan

Arthur Pendragon

Iain De Caestecker

Merlin

Nathaniel Martello-White

Morgan

Valene Kane

Derfel Cadarn

Stuart Campbell

Nimue

Ellie James

Gundleus

Simon Merrells

Bishop Bedwin

Steven Elder

Sansum

Andrew Gower

Sagramor

Ken Nwosu

Lanval

Matt Mella

Ladwys

Tatjana Nardone

Lunete

Olumide Olorunfemi

Cadwys

Billy Postlethwaite

Owain

Daniel Ings

Gorfydd

Aneirin Hughes

Ralla

Charlie Duncan

Tewdric

Sagar Arya

Guinevere

Jordan Alexandra

Culwyn

Gwïon Morris Jones

Ceinwyn

Emily John

Tristan

Gabriel Tierney

Raince

Keith Dunphy

Hywel

Sifiso Mazibuko

Norwenna

Grace Ackary

Ligessac

Ene Frost

Sarlinna

Faith Delaney

Lohilt

San Shella

Dumonian Leader

Cy Foxx

Young Derfel

Jordan Dark

Young Nimue

Lucy Allix

Tattooist

Bryony Morgan

Dumnonian Guard

Rob Murphy

Younger Nimue

Lily Williams

Sylvia

Charlotte Workman

Bowen

Angus Salisbury

Aelle

Craig Parkinson

Brother John

Rhodri Miles

Wenhaver

Miranda Shamiso

Siluarian Warrior

Kevin Metcalfe

Bossk

Joshua Frater-Loughlin

Dumnonian Warrior

Oliver Morgan-Thomas

Malldyn

Ned Dennehy

Ultan

Frank Bourke

Wlenca

Carl Andersson