Burt Lancaster as Elmer Gantry

Jean Simmons as Sister Sharon Falconer

Arthur Kennedy as Jim Lefferts

Dean Jagger as William L. Morgan

Shirley Jones as Lulu Bains

Patti Page as Sister Rachel

Edward Andrews as George F. Babbitt

John McIntire as Rev. John Pengilly

Hugh Marlowe as Rev. Philip Garrison

Joe Maross as Pete

Philip Ober as Reverend Planck

Barry Kelley as Police Captain Holt

Wendell Holmes as Reverend Ulrich

Dayton Lummis as Eddington

Colin Kenny as Extra at Revival Meeting

William H. O'Brien as Train Conductor

Bert Stevens as Choir Member

John Qualen as Sam - Storekeeper

Rex Ingram as Preacher of Black Congregation (uncredited)

Sally Fraser as Prostitute

Robert P. Lieb as Lincoln Police Captain

Larry J. Blake as Mac - Bartender (uncredited)

Peter Brocco as Benny - Photographer (uncredited)

George Cisar as Salesman in Saloon (uncredited)

Ralph Dumke as Salesman in Saloon (uncredited)

Everett Glass as Rev. Brown (uncredited)

Sol Gorss as Hobo in Boxcar (uncredited)

Norman Leavitt as Salesman in Saloon (uncredited)

Dan Riss as Radio Announcer (uncredited)

Max Showalter as Deaf Man (uncredited)

Dale Van Sickel as Salesman in Saloon (uncredited)

Michael Whalen as Rev. Phillips (uncredited)

Jean Willes as Prostitute (uncredited)

Raoul Freeman as Congregation Member (uncredited)