Niagara

Marilyn Monroe

Rose Loomis

Joseph Cotten

George Loomis

Jean Peters

Polly Cutler

Max Showalter

Ray Cutler

Denis O'Dea

Inspector Starkey

Richard Allan

Patrick

Don Wilson

J.C. Kettering

Lurene Tuttle

Mrs. Kettering

Russell Collins

Mr. Qua

Will Wright

Boatman

Minerva Urecal

Mrs. McGrand

Harry Carey, Jr.

Taxi Driver

Henry Beckman

Motorcycle Cop (uncredited)

Bill Coontz

Young Man (uncredited)

Robert Ellis

Young Man (uncredited)

Neil Fitzgerald

Customs Officer (uncredited)

Gloria Gordon

Dancer (uncredited)

George Ives

Carillon Tower Guide (uncredited)

Arch Johnson

Taxi Driver (uncredited)

Lester Matthews

Doctor (uncredited)

Sean McClory

Sam (uncredited)

Patrick O'Moore

Detective (uncredited)

Tom Reynolds

Husband (uncredited)

Willard Sage

Motorcycle Cop (uncredited)

Bert Stevens

Doctor (uncredited)

Nina Varela

Wife at Bus Station

Gene Wesson

Guide (uncredited)