Macbeth is a tragedy by William Shakespeare about a regicide and its aftermath.  Macbeth is Shakespeare's shortest tragedy, and is believed to have been written some time between 1603 and 1606 with 1607 being the very latest possible date.  Shakespeare's principal sources for Macbeth are the accounts of Kings Duff and Duncan in Holinshed's Chronicles (1587), a history of England, Scotland and Ireland familiar to Shakespeare and his contemporaries.  Macbeth has been adapted to film, television, opera, novels, comic books, and other media.