The Winter King Cast & Characters: Who’s in the King Arthur Series?

Arthur angry
Credit: MGM+

Arthur angry
Credit: MGM+

The Winter King is a retelling of the Arthurian legend, so there are many familiar characters in the series such as King Arthur, Guinevere, Merlin, Uther, Nimue, and Owain. But who plays these characters? And who else stars in the show? Get to know the cast of The Winter King and who they play!

Iain De Caestecker as Arthur Pendragon

Arthur looking up
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Credit: MGM+

Iain De Caestecker stars as Arthur Pendragon, the illegitimate son of King Uther who has been exiled after the King blames him for the death of his son and heir to the throne, Prince Mordred.

Arthur is known to have never lost a battle and has beaten every enemy. Others say that Arthur kills like no man they’ve ever seen. And while he is a bastard, he is a man other men follow.

Iain De Caestecker is known for his role as Leopold Fitz/The Doctor in Marvel’s Agents of S.H.I.E.L.D. He also starred in Ryan Gosling’s directorial debut Lost River and the film Overlord.

Jordan Alexandra as Guinevere

Jordan Alexandra joins The Winter King cast as Guinevere, Arthur’s wife. She’s ambitious and seeks power and a high social status. Jordan Alexandra has appeared in minor roles in Doctor Strange in the Multiverse of Madness and Bridgerton.

Stuart Campbell as Derfel Cadarn

Derfel looking at someone
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Credit: MGM+

Stuart Campbell stars as Derfel Cadarn in The Winter King. Derfel is a Saxon who was saved by Arthur when he was a child. Arthur takes him to Merlin to be treated, and Derfel grows up becoming a part of Avalon. Derfel follows Arthur as he believes that he can save the realm.

Stuart Campbell has appeared in various shows, including Chemistry of Death, SAS: Rogue Heroes, and Outlander.

Ellie James as Nimue

Nimue looking up
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Credit: MGM+

Ellie James joins the cast of The Winter King as Nimue, a druidess who can see the gods. She was saved by Merlin and raised to become the most powerful druid Dumnonia has ever known.

She and Derfel are in love, but they are forbidden from being together because Nimue must not wed and have children, or she will lose her gifts.

Ellie James has appeared in I May Destroy You and The Lost Daughter.

Daniel Ings as Owain

Owain worried
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Credit: MGM+

Daniel Ings stars as Owain, the champion of Dumnonia and Arthur’s friend. He believes that they cannot defeat the Saxons without Arthur.

Daniel Ings has starred in Netflix’s The Crown and Lovesick. He is set to appear in the upcoming Marvel movie, The Marvels.

Valene Kane as Morgan

Morgan looking at someone
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Credit: MGM+

Valene Kane joins The Winter King cast as Morgan, Arthur’s half-sister and another illegitimate child of King Uther. She’s someone who’s not afraid to speak her mind. She’s also a student of Merlin.

Valene Kane has appeared in Rogue One: A Star Wars Story, Gangs of London, The Other Guy, and The Fall.

Simon Merrells as Gundleus

Gundleus listening
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Credit: MGM+

Simon Merrells joins the cast as Gundleus, a villain in The Winter King. Gundleus is King of rival kingdom Siluria. He is a ruthless leader who slaughters anyone who gets in his way.

Simon Merrells has starred in other historical fiction series, namely Spartacus: War of the Damned and Knightfall. He also appeared in The CW’s Legends of Tomorrow and The Tomorrow People, and Amazon Studios’ The Lord of the Rings: The Rings of Power and Good Omens.

Nathaniel Martello-White as Merlin

Merlin slightly smiling and looking up
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Credit: MGM+

Nathaniel Martello-White plays Merlin, a popular character in Arthurian legend. In The Winter King, Merlin is a politician, the most revered druid in Britain, and the one who raised Arthur. He is unafraid to share his thoughts and opinions with Uther because he answers only to his gods.

Nathaniel Martello-White has appeared in Small Axe, Misfits, Moonwalkers, and Law & Order: UK.

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Eddie Marsan as Uther

Uther talking
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Credit: MGM+

Eddie Marsan stars as Uther, the High King of all Dumnonia. He is a respected ruler, as he has proven himself in battle. He is known to be a great warrior and was dubbed “The Great Red Dragon”.

Eddie Marsan has appeared in numerous films, which include Mission: Impossible III, V for Vendetta, Sherlock Holmes, The World's End, and Deadpool 2.

Andrew Gower as Sansum

Andrew Gower joins The Winter King cast as Sansum, “Bishop Bedwin’s fanatical novice, who holds great sway over the Christians of Britain” (via Deadline). Andrew Gower is known for his roles in Being Human, Outlander, and Carnival Row.

Other cast members include:

  • Ken Nwosu as Sagramor
  • Steven Elder as Bishop Bedwin
  • Aneirin Hughes as Gorfydd
  • Emily John as Ceinwyn
  • Tatjana Nardone as Ladwys
  • Billy Postlethwaite as Cadwys
  • Enoch Frost as Ligessac

You can watch the trailer for The Winter King below:

RELATED: Is The Winter King Suitable for Kids? Parents Guide

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