- Cary Grant
- Roger Thornhill
- Eva Marie Saint
- Eve Kendall
- James Mason
- Phillip Vandamm
- Jessie Royce Landis
- Clara Thornhill
- Leo G. Carroll
- The 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
- Stanley Adams
- Lieutenant Harding
- John Alban
- Auction Guest
- Andy Albin
- Farmer
- John Albright
- Auction Guest
- Anne Anderson
- Woman
- Don Anderson
- Worker
- Ernest Anderson
- Porter on Twentieth Century Ltd.
- Malcolm Atterbury
- Man at Prairie Crossing
- Tol Avery
- State Police Detective
- Sam Bagley
- Courtroom Spectator
- Rama Bai
- Woman at United Nations Building
- Frank Baker
- Auction Guest
- Baynes Barron
- Taxi Driver #2
- Brandon Beach
- Man at Auction Guest
- Frances Beck
- Woman
- John Beradino
- Sergeant Emile Klinger
- Sara Berner
- Bit Part
- Audrey Betz
- Auction Guest
- Stephen Bolster
- Man with Camera
- Boyd Cabeen
- Man at United Nations Building
- Roger C. Carmel
- Tall Man in Crowd
- Steve Carruthers
- Auction Guest
- Gordon Carveth
- Auction Guest
- Taggart Casey
- Shaving Man
- Bill Catching
- Auction Attendant
- Bob Coe
- Cropduster Pilot
- David A. Cox
- Police Officer on Horse
- Walter Coy
- U.S. Intelligence Agency Official
- Jimmy Cross
- Taxi Driver #1
- Lucille Curtis
- Woman
- Patricia Cutts
- Hospital Patient
- Jack Daly
- Train Steward
- John Damler
- Police Lieutenant
- Lawrence Dobkin
- U.S. Intelligence Agency Official
- Donna Douglas
- Woman on Sidewalk
- Dan Dowling
- Auction Guest
- Ken DuMain
- Auction Guest
- Daniel Elam
- Man at United Nations Building
- Tommy Farrell
- Eddie
- Jesslyn Fax
- Woman on Train
- Adolph Faylauer
- Bald Bidder
- Bess Flowers
- Hotel Lounge Patron
- Josephine Forsberg
- Friendly Passenger
- Sally Fraser
- Second United Nations Receptionist
- Paul Genge
- Lieutenant Hagerman
- Kenneth Gibson
- Auction Guest
- Ned Glass
- Grand Central Station Ticket Seller
- James Gonzalez
- Auction Guest
- Tom Greenway
- Silent State Police Detective
- Robert Haines
- Man at United Nations Building
- Stuart Hall
- Train Passenger
- Len Hendry
- Police Lieutenant
- Alfred Hitchcock
- Man Who Misses Bus
- Stuart Holmes
- Hotel Lounge Patron
- Hideo Inamura
- Man at United Nations Building
- Eugene Jackson
- Security Guard at Auction
- Bobby Johnson
- Waiter
- Dick Johnstone
- Courtroom Spectator
- Sid Kane
- Minor Role
- Kenner G. Kemp
- Man Leaving Office Building
- Madge Kennedy
- Mrs. Finlay
- Colin Kenny
- Auction Guest
- Doreen Lang
- Maggie
- Perk Lazelle
- Auction Guest
- Larry Leverett
- Man in Phone Booth
- Carl M. Leviness
- Man at United Nations Building
- Caryl Lincoln
- Auction Guest
- Alexander Lockwood
- Judge Anson Flynn
- Leota Lorraine
- Auction Guest
- Frank Marlowe
- Taxi Driver
- Nora Marlowe
- Anna
- Tom Marshall
- Police Officer in Chicago
- Thomas Martin
- Train Passenger
- James McCallion
- Plaza Valet
- Maura McGiveney
- Attendant
- Carl Milletaire
- Hotel Clerk
- Hans Moebus
- Man at United Nations Building
- Howard Negley
- Conductor on Twentieth Century, Ltd.
- Monty O'Grady
- Man at United Nations Building
- Henry O'Neill
- Man in Plaza Bar
- John Pedrini
- Man at United Nations Building
- Murray Pollack
- Worker
- Charles Postal
- Minor Role
- Maudie Prickett
- Elsie
- Hugh Pryor
- Minor Role
- Anthony Redondo
- Auction Guest
- Ralph Reed
- Bellhop
- Greg Rhinelander
- Hotel Lounge Patron
- Lili Rosson
- Bystander
- John Roy
- Train Passenger
- Cosmo Sardo
- Worker
- Jeffrey Sayre
- Hotel Lounge Patron / Man at Mt. Rushmore Cafeteria (uncredited)
- Scott Seaton
- Auction Guest
- Harry Seymour
- Victor
- Robert Shayne
- Larry Wade
- Larry Sherman
- Cab Driver
- Ami Silvestre
- Woman
- Doris Singh
- First United Nations Receptionist
- Jeremy Slate
- Policeman at Grand Central Station
- Olan Soule
- Assistant Auctioneer
- Bert Spencer
- Auction Guest
- Helen Spring
- Bidder
- Harvey Stephens
- Stockbroker
- Bert Stevens
- Man at United Nations Building
- Harry Strang
- Assistant Conductor
- Robert Strong
- Auction Guest
- Joe Szorentini
- Man Opening Door for Thornhill
- Paul Togawa
- Man at United Nations Building
- Arthur Tovey
- Auction Guest
- Dale Van Sickel
- Ranger
- Ray Weaver
- Policeman at Grand Central Station
- Susan Whitney
- Attendant
- Luree Wiese
- Auction Guest
- Frank Wilcox
- Herman Weitner
- Lloyd Williams
- Minor Role
- Robert B. Williams
- Patrolman Waggoner
- Paula Winslowe
- Woman at Auction
- Wilson Wood
- Photographer at United Nations
- Carleton Young
- Fanning Nelson
- Ernesto Zambrano
- Auction Guest