Rosemary Baby is a American psychological horror film written and directed by Roman Polanski .Rosemary Woodhouse, a bright but somewhat naive young housewife, and Guy, her husband and a struggling actor, move into the Bramford, an opulent but antiquated New York City apartment building. The couple learns from the building's manager, Mr. Nicklas, that their new residence was previously inhabited by Mrs. Gardenia, an elderly woman who had seemingly gone senile.