Gawain and the Green Knight is a 1973 film directed by Stephen Weeks, and starring Murray Head as Gawain and Nigel Green in his final theatrical film as the Green Knight. The story is based on the medieval English tale Sir Gawain and the Green Knight and also Yvain, the Knight of the Lion by Chrétien de Troyes and the tale of Sir Gareth in Thomas Malory's Le Morte d'Arthur. Locations used included castles at Cardiff, Caerphilly and Castell Coch, Wales; Peckforton castle, Cheshire; and St. Michael's Mount and Roche rock, Cornwall. St. Govan's chapel on the Pembrokeshire coast was also featured.