Pat Billingsley
![Pat Billingsley](http://image.tmdb.org/t/p/h632/AaTqBmxCX3JCGFPk2IHILAryUY0.jpg)
Known For: Acting
Gender: Male
Date of Birth: May 3, 1925
Day of Death: April 22, 2011 (86 years old)
Place of Birth: Sioux Falls, South Dakota, USA
Patrick Billingsley was an American mathematician and stage and screen actor, noted for his books in advanced probability theory and statistics. He was born and raised in Sioux Falls, South Dakota, and graduated from the United States Naval Academy in 1946.