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

Larry J. Blake
Mac - Bartender (uncredited)

Peter Brocco
Benny - Photographer (uncredited)

George Cisar
Salesman in Saloon (uncredited)

Ralph Dumke
Salesman in Saloon (uncredited)

Everett Glass
Rev. Brown (uncredited)

Norman Leavitt
Salesman in Saloon (uncredited)

Dan Riss
Radio Announcer (uncredited)

Max Showalter
Deaf Man (uncredited)

Dale Van Sickel
Salesman in Saloon (uncredited)

Michael Whalen
Rev. Phillips (uncredited)

Jean Willes
Prostitute (uncredited)

Harry Antrim
Salesman in Saloon (uncredited)

Claudia Bryar
Religious woman collecting money in opening scene (uncredited)

Mike Lally
Radio Station Official (uncredited)

BarBara Luna
Prostitute (uncredited)

Charles Morton
Man Destroying Revival Tent (uncredited)

Milton Parsons
Revivalist (uncredited)

Jack Stoney
Revival Tent Roustabout (uncredited)

Ken Terrell
Blind Man (uncredited)

Ray Walker
Salesman in Saloon (uncredited)

Guy Wilkerson
Janitor in Revival Tent (uncredited)