Colin Morgan stars as Merlin, Bradley James as Prince Arthur, and Richard Wilson as Gaius in the BBC fantasy series ‘Merlin’.
Main cast
- MerlinColin Morgan1–5Main
- Prince Arthur / King ArthurBradley James1–5Main
- GaiusRichard Wilson1–5Main
- MorganaKatie McGrath1–5Main
- Uther PendragonAnthony Head1–4Main
- Guinevere ‘Gwen’Angel Coulby1–5Main
- LancelotSantiago Cabrera1–5Main
- GwaineEoin Macken3–5Main
Supporting cast
- LeonRupert Young3–5Supp
- ElyanAdetomiwa Edun3–5Supp
- PercivalTom Hopper3–5Supp
- MordredAsa Butterfield3–5Supp
- NimuehMichelle Ryan1Supp
Guest & voice
- The Great Dragon / KilgharrahJohn Hurt1–5Voice
- MorgauseEmilia Fox2–4Guest
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About this cast
‘Merlin’ is a BBC fantasy series that reimagines the Arthurian legend, focusing on the young wizard Merlin as he serves Prince Arthur in Camelot. The show ran for five seasons from 2008 to 2012, blending adventure, magic, and drama.
FAQs
Who plays Merlin in Merlin?
Colin Morgan plays the title character Merlin in the BBC series ‘Merlin’.
Who plays Prince Arthur in Merlin?
Bradley James plays Prince Arthur, later King Arthur, in ‘Merlin’.
Who plays Gaius in Merlin?
Richard Wilson plays Gaius, the court physician and Merlin’s mentor, in ‘Merlin’.
Who plays Morgana in Merlin?
Katie McGrath plays Morgana, Uther’s ward who becomes a powerful sorceress, in ‘Merlin’.
Who plays Guinevere in Merlin?
Angel Coulby plays Guinevere ‘Gwen’, Arthur’s love interest and later queen, in ‘Merlin’.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026