Cymbeline, also known as The Tragedie of Cymbeline or Cymbeline, King of Britain, is a play by William Shakespeare set in Ancient Britain and based on legends that formed part of the Matter of Britain concerning the early historical Celtic British King Cunobeline. Although it is listed as a tragedy in the First Folio, modern critics often classify Cymbeline as a romance or even a comedy. Like Othello and The Winter's Tale, it deals with the themes of innocence and jealousy. While the precise date of composition remains unknown, the play was certainly produced as early as 1611.

William Shakespeare was an English playwright, poet, and actor. He is widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. He is often called England's national poet and the "Bard of Avon". His extant works, including collaborations, consist of some 39 plays, 154 sonnets, three long narrative poems, and a few other verses, some of uncertain authorship. His plays have been translated into every major living language and are performed more often than those of any other playwright. Shakespeare remains arguably the most influential writer in the English language, and his works continue to be studied and reinterpreted.