The Winter King (TV) Cast
The cast of The Winter King. Updated on September 17, 2025.
45 actors
Iain De Caestecker
as Arthur Pendragon (10 episodes)

Iain De Caestecker portrays the character of Arthur Pendragon, the central figure in The Winter King. Arthur is a young and ambitious man who becomes the legendary king and establishes the Knights of the Round Table.

Stuart Campbell
as Derfel Cadarn (10 episodes)

Stuart Campbell plays the role of Derfel Cadarn in The Winter King. Derfel is a loyal and skilled warrior who becomes one of Arthur's most trusted knights and advisors.

Ellie James
as Nimue (10 episodes)

Ellie James portrays the character of Nimue in The Winter King. Nimue is a powerful sorceress and a key figure in Arthur's journey, providing him with guidance and mystical abilities.

Steven Elder
as Bishop Bedwin (10 episodes)

Steven Elder plays the role of Bishop Bedwin in The Winter King. Bishop Bedwin is a religious figure who has an important role in the story, offering guidance and moral dilemmas to the characters.

Valene Kane
as Morgan (10 episodes)

Valene Kane portrays the character of Morgan in The Winter King. Morgan is a complex character, often depicted as Arthur's half-sister or his rival, with her own ambitions and agendas.

Simon Merrells
as Gundleus (10 episodes)

Simon Merrells plays the role of Gundleus in The Winter King. Gundleus is a powerful and influential nobleman with his own ambitions and desires for power.

Ken Nwosu
as Sagramor (10 episodes)

Ken Nwosu portrays the character of Sagramor in The Winter King. Sagramor is a skilled knight and one of Arthur's loyal companions, always ready to defend the kingdom.

Olumide Olorunfemi
as Lunete (10 episodes)

Olumide Olorunfemi plays the role of Lunete in The Winter King. Lunete is a trusted servant and confidante to Arthur, playing a supportive role throughout his journey.

Billy Postlethwaite
as Cadwys (10 episodes)
Daniel Ings
as Owain (10 episodes)
Nathaniel Martello-White
as Merlin (10 episodes)
Eddie Marsan
as High King Uther (10 episodes)
Jordan Alexandra
as Guinevere (10 episodes)
Cy Foxx
as Dumonian Leader (1 episode)
Sagar Arya
as Tewdric (6 episodes)
Jordan Dark
as Young Derfel (1 episode)
Sifiso Mazibuko
as Hywel (2 episodes)
Lucy Allix
as Young Nimue (1 episode)
Bryony Morgan
as Tattooist (1 episode)
Grace Ackary
as Norwenna (2 episodes)
Charlie Duncan
as Ralla (6 episodes)
Ene Frost
as Ligessac (2 episodes)
Gwïon Morris Jones
as Culwyn (5 episodes)
Rob Murphy
as Dumnonian Guard (1 episode)
Matt Mella
as Lanval (9 episodes)
Tatjana Nardone
as Ladwys (7 episodes)
Andrew Gower
as Sansum (7 episodes)
Aneirin Hughes
as Gorfydd (6 episodes)
Lily Williams
as Younger Nimue (1 episode)
Charlotte Workman
as Sylvia (1 episode)
Faith Delaney
as Sarlinna (2 episodes)
San Shella
as Lohilt (2 episodes)
Emily John
as Ceinwyn (4 episodes)
Gabriel Tierney
as Tristan (4 episodes)
Keith Dunphy
as Raince (3 episodes)
Angus Salisbury
as Bowen (1 episode)
Craig Parkinson
as Aelle (1 episode)
Rhodri Miles
as Brother John (1 episode)
Miranda Shamiso
as Wenhaver (1 episode)
Kevin Metcalfe
as Siluarian Warrior (1 episode)
Carl Andersson
as Wlenca (1 episode)
Joshua Frater-Loughlin
as Bossk (1 episode)
Oliver Morgan-Thomas
as Dumnonian Warrior (1 episode)
Ned Dennehy
as Malldyn (1 episode)
Frank Bourke
as Ultan (1 episode)
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