 James StewartL.B. Jefferies | L.B. Jefferies |
 Grace KellyLisa Fremont | Lisa Fremont |
 Wendell CoreyThomas Doyle | Thomas Doyle |
 Thelma RitterStella | Stella |
 Raymond BurrLars Thorwald | Lars Thorwald |
 Judith EvelynMiss Lonelyhearts | Miss Lonelyhearts |
 Ross BagdasarianSongwriter | Songwriter |
 Georgine DarcyMiss Torso | Miss Torso |
 Sara BernerWoman on Fire Escape | Woman on Fire Escape |
 Frank CadyMan on Fire Escape | Man on Fire Escape |
 Jesslyn FaxMiss Hearing Aid | Miss Hearing Aid |
| RRand HarperNewlywed | Newlywed |
 Irene WinstonEmma Thorwald | Emma Thorwald |
| HHavis DavenportNewlywed | Newlywed |
 Jerry AntesDancer with Miss Torso (uncredited) | Dancer with Miss Torso (uncredited) |
 Benny BartlettMan with Miss Torso (uncredited) | Man with Miss Torso (uncredited) |
 Sue CaseySunbather (uncredited) | Sunbather (uncredited) |
 Iphigenie CastiglioniWoman with Bird (uncredited) | Woman with Bird (uncredited) |
| JJames Cornell(uncredited) | (uncredited) |
| DDon DunningDetective (uncredited) | Detective (uncredited) |
 Marla EnglishGirl at Songwriter's Party (uncredited) | Girl at Songwriter's Party (uncredited) |
 Bess FlowersSongwriter's Party Guest with Poodle (uncredited) | Songwriter's Party Guest with Poodle (uncredited) |
 Art GilmoreRadio Announcer (voice) (uncredited) | Radio Announcer (voice) (uncredited) |
 Fred GrahamDetective (uncredited) | Detective (uncredited) |
 Kathryn GrantGirl at Songwriter's Party (uncredited) | Girl at Songwriter's Party (uncredited) |
| CCharles Harvey(uncredited) | (uncredited) |
| LLen HendryPoliceman (uncredited) | Policeman (uncredited) |
 Alfred HitchcockClock-Winder in Songwriter's Apartment (uncredited) | Clock-Winder in Songwriter's Apartment (uncredited) |
 Harry LandersMan with Miss Lonelyhearts (uncredited) | Man with Miss Lonelyhearts (uncredited) |
| AAlan LeeNewlyweds' Landlord (uncredited) | Newlyweds' Landlord (uncredited) |
