Marguerite Chapman, who plays the Switchboard Operator, was actually a switchboard operator and typist. People constantly remarked on her beauty and how she 'ought to be in movies'. She became a model in New York City and after appearing on many magazine covers, Hollywood finally called for her.
Lee Meriwether's daughter Kyle Aletter plays Steph. Steph is seen playing tennis with Wendy Gray at their school.
Elissa Leeds would play a somewhat similar part in Catch a Falling Angel (1980), only this time, she was a very willing participant in the obscene shenanigans, and even dumps her boyfriend for her "job".