 When asked why actresses Sandra Bullock (qv) and  Nicole Kidman (qv) were to play sisters when they obviously looked  nothing alike, director Griffin Dunne (qv) stated that when he  researched historical witches that often times witch siblings  typically looked nothing alike. Thus it made sense that the two were  cast as sisters. However, when he was casting Griffin did made sure  the two actresses who played Sandras daughters had features similar  to each of the two main stars.