- Producer Martin Ransohoff discovered Sharon Tate on the set of "Beverly Hillbillies, The" (1962), and insisted that director Roman Polanski use her instead of Jill St. John as Polanski had planned.
- The original format of the film was to be spherical widescreen. However, at the early stages of production the format was changed to wider, anamorphic Panavision. This results in some of the spherical shots had to be reframed and cropped in order to be as wide as Panavision.
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