An epic fantasy adventure based on the timeless Arthurian legend, The Green Knight tells the story of Sir Gawain, King Arthur's reckless and headstrong nephew, who embarks on a daring quest to confront the eponymous Green Knight, a gigantic emerald-skinned stranger and tester of men. Sir Gawain, King Arthur's young nephew, embarks on an adventurous journey and deals with ghosts, thieves and giants as he sets out to defeat Green Knight, a giant, after accepting his challenge. The film stars Dev Patel as Gawain, who sets out on a journey to test his courage and face the Green Knight. It also stars Alicia Vikander, Joel Edgerton.