How to find the name of an old movie
What was the name of a murder/ suspense movie made in the late 1950's or 1 early 1960's where a child was born a girl but raised as a boy to please the father, and the nanny is the only one who knows the deadly secret? As the child grows up, the male part of the personality w becomes engaged never letting on that he is in actuality a female. As an adult the split personality becomes a serisal killer and also kills the nanny whom threatens to tell the deadly secrety. In the end the e split personality reveals the true identity to to alleged fianceee on the verge of killing them! Please help me find the name to this movie!
