The Three Witches, also known as the Weird Sisters or Wayward Sisters, are characters in William Shakespeare's play Macbeth. The witches eventually lead Macbeth to his demise, and they hold a striking resemblance to the three Fates of classical mythology. Their origin lies in Holinshed's Chronicles (1587), a history of England, Scotland and Ireland. Other possible sources, apart from Shakespeare, include British folklore, contemporary treatises on witchcraft as King James VI of Scotland's Daemonologie, the Witch of Endor from the Bible, the Norns of Norse mythology, and ancient classical myths of the Fates: the Greek Moirai and the Roman Parcae.

Macbeth is a tragedy by William Shakespeare. It is thought to have been first performed in 1606. It dramatises the damaging physical and psychological effects of political ambition on those who seek power. Of all the plays that Shakespeare wrote during the reign of James I, Macbeth most clearly reflects his relationship with King James, patron of Shakespeare's acting company. It was first published in the Folio of 1623, possibly from a prompt book, and is Shakespeare's shortest tragedy.