Cary Grant
Roger Thornhill

Eva Marie Saint
Eve Kendall

James Mason
Phillip Vandamm

Jessie Royce Landis
Clara Thornhill

Leo G. Carroll
Professor

Josephine Hutchinson
Mrs. Townsend

Philip Ober
Lester Townsend

Martin Landau
Leonard

Adam Williams
Valerian

Edward Platt
Victor Larrabee

Robert Ellenstein
Licht

Les Tremayne
Auctioneer

Philip Coolidge
Dr. Cross

Patrick McVey
Sergeant Flamm

Edward Binns
Captain Junket

Ken Lynch
Charley

Doreen Lang
Maggie - Thornhill's Secretary (uncredited)

John Beradino
Sergeant Emile Klinger (uncredited)

Ned Glass
Ticket Seller (uncredited)

Tol Avery
State Police Detective (uncredited)

Malcolm Atterbury
Man at Prairie Crossing (uncredited)

Maudie Prickett
Hotel Maid Elsie (uncredited)

Bess Flowers
Plaza Hotel Lounge Patron (uncredited)

Stanley Adams
Lieutenant Harding (uncredited)

Ernest Anderson
Porter on Twentieth Century Ltd. (uncredited)

Frank Wilcox
Herman Weltner (uncredited)

Steve Carruthers
Man at Auction (uncredited)

Taggart Casey
Shaving Man (uncredited)

Walter Coy
U.S. Intelligence Agency Official (uncredited)

Patricia Cutts
Hospital Patient (uncredited)

John Damler
Police Lieutenant (uncredited)

Lawrence Dobkin
U.S. Intelligence Agency Official (uncredited)

Tommy Farrell
Eddie - Elevator Starter (uncredited)

Jesslyn Fax
Train Passenger (uncredited)

Adolph Faylauer
Bald Bidder (uncredited)

Sally Fraser
Second United Nations Receptionist (uncredited)

Alfred Hitchcock
Man Who Misses Bus (uncredited)

Stuart Holmes
Hotel Lounge Patron (uncredited)

Eugene Jackson
Security Guard at Auction (uncredited)

Kenner G. Kemp
Man Leaving Office Building (uncredited)

Madge Kennedy
Mrs. Finlay (uncredited)

Colin Kenny
Man at Auction (uncredited)

Carl M. Leviness
Man at United Nations Building (uncredited)

Alexander Lockwood
Judge Anson B. Flynn (uncredited)

Frank Marlowe
Taxi Driver (uncredited)

Baynes Barron
Taxi Driver #2 (uncredited)

James McCallion
Plaza Valet (uncredited)

Carl Milletaire
Hotel Clerk (uncredited)

Howard Negley
Conductor on Twentieth Century, Ltd. (uncredited)

Monty O'Grady
Man at United Nations Building (uncredited)

John Roy
Train Passenger (uncredited)

Jeffrey Sayre
Hotel Lounge Patron / Man at Mt. Rushmore Cafeteria (uncredited)

Scott Seaton
Man at Auction (uncredited)

Robert Shayne
Larry Wade (uncredited)

Jeremy Slate
Policeman at Grand Central Station (uncredited)

Olan Soule
Assistant Auctioneer (uncredited)

Helen Spring
Bidder (uncredited)

Harvey Stephens
Stockbroker (uncredited)

Harry Strang
Assistant Conductor (uncredited)

Arthur Tovey
Man at Auction (uncredited)

Dale Van Sickel
Ranger (uncredited)

Robert B. Williams
Patrolman Waggoner (uncredited)

Carleton Young
Fanning Nelson (uncredited)

Dick Johnstone
Courtroom Spectator (uncredited)

Bert Stevens
Man at United Nations Building (uncredited)

Cosmo Sardo
Worker (uncredited)

Roger C. Carmel
Tall Man in Crowd (uncredited)

Donna Douglas
Woman on Sidewalk (uncredited)

Caryl Lincoln
Auction Guest (uncredited)