Excalibur

Excalibur is a 1981 medieval fantasy film directed, co-written and produced by John Boorman, that retells the legend of King Arthur and the knights of the Round Table, based loosely on the 15th-century Arthurian romance Le Morte d'Arthur by Thomas Malory. It stars Nigel Terry as Arthur, Helen Mirren as Morgana, Nicholas Clay as Lancelot, Cherie Lunghi as Guenevere, Paul Geoffrey as Perceval and Nicol Williamson as Merlin.