Johnny Capps Creator Julian Jones Creator, Writer Jake Michie Creator Julian Murphy Creator Colin Morgan Merlin Actor Bradley James Arthur Pendragon Actor Anthony Head Uther Pendragon Actor Richard Wilson Gauis Actor Angel Coulby Gwen Actor Katie McGrath Morgana Actor John Hurt The Great Dragon Voice Nathaniel Parker Agravaine Actor Ben Daniels Guest Star Miranda Raison Guest Star Tomiwa Edun Guest Star Eoin Macken Guest Star Rupert Young Guest Star Tom Hopper Guest Star Terence Maynard Guest Star Alice Troughton Director