Nigel Terry as King Arthur

Nicol Williamson as Merlin

Helen Mirren as Morgana

Nicholas Clay as Lancelot

Paul Geoffrey as Perceval

Cherie Lunghi as Guenevere

Robert Addie as Mordred

Gabriel Byrne as Uther

Keith Buckley as Uryens

Katrine Boorman as Igrayne

Corin Redgrave as Cornwall

Liam Neeson as Gawain

Niall O'Brien as Kay

Patrick Stewart as Leondegrance

Clive Swift as Ector

Ciarán Hinds as Lot

Liam O'Callaghan as Sadok

Michael Muldoon as Astamor

Charley Boorman as Boy Mordred

Brid Brennan as Lady in Waiting

Garrett Keogh as Mador

Emmet Bergin as Ulfius

Eamon Kelly as Abbot

Gerard Mannix Flynn as Mordred's Lieutenant

Barbara Byrne as Young Morgana

Kay Maclaren as Aged Morgana

Joelle Hélary as Lady of the Lake

Conor Lambert as Puppeteer

Prudence Wright Holmes as Sunshine