Personaje Actor Notas de voz Merlin Colin Morgan ---- Merlin Arthur Pendragon Bradley James ---- Arthur Pendragon Morgan Katie Mcgrath ---- Morgana Pendragon Gwenville Pendragon Angel Coulby ---- Guinevere Pendragon Gaius Richard ·Richard Wilson ---- Gaius Uther Pendragon Anthony Head (Anthony Head) ---- Uthur Pendragon Lancelot Santiago Cabrera (Santiago Cabrera) ---- Lancelot Gawain Eoin Macken ---- Gwaine Percival Tom Hopper ---- Percival Tristan Ben Daniels Christopher Fair Banks Tristan Elyan Adetomiwa Edun ---- Elyan Leon Rupert Young ---- Leon Mordred (niño) Asa Butterfield ---- Mordred joven Alexander Vlahos ---- Modred adulto ---- John Herir al gran dragón Morgause Amy Lea Fox----Morgause Michelle Ryan----Nimueh Freya Laura Donnelly----Freya Caroline Faber- ---Hunith