 Merle OberonKitty Langley | Kitty Langley |
 Laird CregarMr. Slade | Mr. Slade |
 George SandersInspector John Warwick | Inspector John Warwick |
 Cedric HardwickeRobert Bonting | Robert Bonting |
 Sara AllgoodEllen Bonting | Ellen Bonting |
 Aubrey MatherSuperintendent Sutherland | Superintendent Sutherland |
 Queenie LeonardDaisy the Maid | Daisy the Maid |
 Doris LloydJennie | Jennie |
 David ClydeDet. Sgt. Bates | Det. Sgt. Bates |
 Helena PickardAnnie Rowley | Annie Rowley |
 Ruth CliffordHairdresser (uncredited) | Hairdresser (uncredited) |
 Thora HirdFirst Murder Victim Katie (uncredited) | First Murder Victim Katie (uncredited) |
 Anita Sharp-BolsterWiggy (uncredited) | Wiggy (uncredited) |
 C. Montague ShawStage Manager (uncredited) | Stage Manager (uncredited) |
 Skelton KnaggsMan with Cart | Man with Cart |
 Charlie HallComedian | Comedian |
 Bess FlowersWoman in Audience | Woman in Audience |
 Olaf HyttenHarris, the Haberdasher | Harris, the Haberdasher |
| HHeather WildeNot listed | Not listed |
 Fred AldrichNot listed | Not listed |
 Harry AllenNot listed | Not listed |
 Jimmy AubreyNot listed | Not listed |
| WWilson BengeNot listed | Not listed |
 Billy BevanNot listed | Not listed |
 Ted BillingsNot listed | Not listed |
 Edmund BreonNot listed | Not listed |
| MMae BruceNot listed | Not listed |
 Colin CampbellNot listed | Not listed |
| HHerbert CliftonNot listed | Not listed |
| GGrace DaviesNot listed | Not listed |
