The Weird Sisters, from William Shakespeare's play Macbeth, are arguably the most famous trio of witches in English literature. Shakespeare's Weird Sisters are a complex trinitarian mythological construction - a unique amalgamation of classical, folkloric, and socio-political elements. This book is an archetypal exploration of the Weird Sisters, by examining this feminine trio through the lens of mythology, new insights about their significance may be understood. The ramifications extend from classical comprehension to twenty-first century pop culture observations related to female trios.