Love's Labour's Lost is one of William Shakespeare's early comedies, believed to have been written in the mid-1590s for a performance at the Inns of Court before Queen Elizabeth I.

It follows the King of Navarre and his three companions as they attempt to forswear the company of women for three years of study and fasting, and their subsequent infatuation with the Princess of Aquitaine and her ladies. In an untraditional ending for a comedy, the play closes with the death of the Princess's father, and all weddings are delayed for a year. The play draws on themes of masculine love and desire, reckoning and rationalization, and reality versus fantasy.

Love's Labour's Lost was staged rarely in the 19th century, but it has been seen more often in the 20th and 21st centuries, with productions by both the Royal Shakespeare Company and the National Theatre, among others. It has also been adapted as a musical, an opera, for radio and television and as a musical film. 

Love's Labour's Lost features the longest scene, the longest single word, and (depending on editorial choices) the longest speech in all of Shakespeare's plays.

William Shakespeare (1564-1616) was an English poet, playwright and actor, widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist. His extant works, including some collaborations, consist of about 38 plays, 154 sonnets, two long narrative poems, and a few other verses. His plays have been translated into every major living language and are performed more often than those of any other playwright.

Shakespeare was a respected poet and playwright in his own day, but his reputation did not rise to its present heights until the 19th century. His plays remain highly popular today and are constantly studied, performed, and reinterpreted in diverse cultural and political contexts throughout the world.

In 2016, celebrations will commence in the United Kingdom and across the world to honour The Bard's 400th anniversary.