Betsy Palmer
Betsy Palmer was an American actress, known as a regular supporting movie and Broadway actress and television guest star, as a panelist on the game show Ive Got a Secret, and later for playing the murderous serial killer mother, Pamela Voorhees in the popular slasher film Friday the 13th.
Betsy Palmer was born on Monday, November 1, 1926, as Patricia Betsy Hrunek in East Chicago, Indiana, the daughter of Marie , who launched the Chicago Business College, and Rudolph Vincent Hrunek, an industrial chemist who was an immigrant from Czechoslovakia. She graduated from the Goodman School of Drama at DePaul University, where she studied theater.
Source: Wikipedia