Sarah Sanderson is the youngest witch of the Sanderson Sisters, and the tertiary antagonist of the 1993 Disney Halloween comedy drama film, Hocus Pocus. She was portrayed by Sarah Jessica Parker. In 17th century Salem, Sarah had an affair with her sister Winnie's lover, William "Billy the Butcher" Butcherson. When Winnie found out, she jealously poisoned Billy and sewed his mouth shut. This infidelity may have caused Winifred to hunt down youth and beauty, as she may have thought that her sister's greater beauty stole Billy from her. Ever since then, their sister Mary has had to act as a peacemaker between the two.