Frank Miller Creator, Executive Producer Tom Wheeler Creator, Executive Producer Katherine Langford Nimue Actor Devon Terrell Arthur Actor Gustaf Skarsgård Merlin Actor Peter Mullan Father Carden Actor Lily Newmark Pym Actor Shalom Brune-Franklin Igraine Actor Daniel Sharman Weeping Monk Actor Sebastian Armesto King Uther Pendragon Actor Emily Coates Sister Iris Actor Billy Jenkins Squirrel Actor Bella Dayne Red Spear Actor Matt Stokoe Gawain Actor Leila Gerstein Executive Producer Zetna Fuentes Executive Producer Silenn Thomas Co-Executive Producer Alex Boden Producer