Burt Lancaster
Elmer Gantry

Jean Simmons
Sister Sharon Falconer

Arthur Kennedy
Jim Lefferts

Dean Jagger
William L. Morgan

Shirley Jones
Lulu Bains

Patti Page
Sister Rachel

Edward Andrews
George F. Babbitt

John McIntire
Rev. John Pengilly

Hugh Marlowe
Rev. Philip Garrison

Joe Maross
Pete

Philip Ober
Reverend Planck

Barry Kelley
Police Captain Holt

Wendell Holmes
Reverend Ulrich

Dayton Lummis
Eddington

Colin Kenny
Extra at Revival Meeting

William H. O'Brien
Train Conductor

Bert Stevens
Choir Member

John Qualen
Sam - Storekeeper

Rex Ingram
Preacher of Black Congregation (uncredited)

Sally Fraser
Prostitute