 The script called for Rosemary (Mia Farrow (qv)) to explain to Guy  (John Cassavetes (qv)), that shed "been to Vidal Sassoon" for her  dramatic new haircut. Thus, Vidal Sassoon (qv) was in fact flown  to the set to arrange Mia Farrow (qv)s hair into the now iconic  pixie cut she sports during the second half of the film. For the  first part, she wears a blonde wig designed by famed stylist  Sydney Guilaroff (qv).