William Lilly (11 May [O.S. 1 May] 1602 – 9 June 1681) was a seventeenth century English astrologer. He is described as having been a genius at something "that modern mainstream opinion has since decided cannot be done at all" having developed his stature as the most important astrologer in England through his social and political connections as well as going on to have an indelible impact on the future course of Western astrological tradition.
