James Stewart

L.B. Jefferies

Grace Kelly

Lisa Fremont

Wendell Corey

Thomas Doyle

Thelma Ritter

Stella

Raymond Burr

Lars Thorwald

Judith Evelyn

Miss Lonelyhearts

Ross Bagdasarian

Songwriter

Georgine Darcy

Miss Torso

Sara Berner

Woman on Fire Escape

Frank Cady

Man on Fire Escape

Jesslyn Fax

Miss Hearing Aid

Irene Winston

Emma Thorwald

Jerry Antes

Dancer with Miss Torso (uncredited)

Benny Bartlett

Man with Miss Torso (uncredited)

Sue Casey

Sunbather (uncredited)

Iphigenie Castiglioni

Woman with Bird (uncredited)

Marla English

Girl at Songwriter's Party (uncredited)

Bess Flowers

Songwriter's Party Guest with Poodle (uncredited)

Art Gilmore

Radio Announcer (voice) (uncredited)

Fred Graham

Detective (uncredited)

Kathryn Grant

Girl at Songwriter's Party (uncredited)

Alfred Hitchcock

Clock-Winder in Songwriter's Apartment (uncredited)

Harry Landers

Man with Miss Lonelyhearts (uncredited)

Mike Mahoney

Policeman (uncredited)

Eddie Parker

Detective (uncredited)

Dick Simmons

Man with Miss Torso (uncredited)

Jack Stoney

Ice Man (uncredited)

Anthony Warde

Detective (uncredited)

Gig Young

Jeff's Editor (voice) (uncredited)