The "Gawain Poet", or less commonly the "Pearl Poet", is the name given to the author of Sir Gawain and the Green Knight, an alliterative poem written in 14th-century Middle English. Its author appears also to have written the poems Pearl, Patience, and Cleanness; some scholars suggest the author may also have composed Saint Erkenwald. Save for the last, all these works are known from a single surviving manuscript, the British Library holding 'Cotton MS' Nero A.x. This body of work includes some of the most highly-regarded poetry written in Middle English.

Sir Gawain and the Green Knight is a late 14th-century chivalric romance in Middle English alliterative verse. The author is unknown; the title was given centuries later. It is one of the best-known Arthurian stories, with its plot combining two types of folk motifs: the beheading game, and the exchange of winnings. Written in stanzas of alliterative verse, each of which ends in a rhyming bob and wheel, it draws on Welsh, Irish, and English stories, as well as the French chivalric tradition. It is an important example of a chivalric romance, which typically involves a hero who goes on a quest which tests his prowess. It remains popular in modern English renderings from J. R. R. Tolkien, Simon Armitage, and others, as well as through film and stage adaptations.