Was the on-camera photo double for
Hayley Mills, as the twin in the
Disney movie
The Parent Trap (1961). With the camera shooting over her
shoulder, her back to the camera, Henning was the other half of the twins in a few scenes. Susan won Miss Teen USA title, and had a successful modeling career, appearing in national commercials for Sea & Ski and Pepsi. She appeared on the famous first "Got Milk" billboards across the country.