 Cary GrantJohn D. 'Johnnie' Aysgarth | John D. 'Johnnie' Aysgarth |
 Joan FontaineLina McLaidlaw Aysgarth | Lina McLaidlaw Aysgarth |
 Cedric HardwickeGeneral McLaidlaw | General McLaidlaw |
 Nigel BruceGordon Cochrane 'Beaky' Thwaite | Gordon Cochrane 'Beaky' Thwaite |
 May WhittyMrs. McLaidlaw | Mrs. McLaidlaw |
| IIsabel JeansMrs. Newsham | Mrs. Newsham |
 Heather AngelEthel the Maid | Ethel the Maid |
 Auriol LeeIsobel Sedbusk | Isobel Sedbusk |
 Reginald SheffieldReggie Wetherby | Reggie Wetherby |
 Leo G. CarrollCaptain George Melbeck | Captain George Melbeck |
 Billy BevanTicket Taker (uncredited) | Ticket Taker (uncredited) |
 Faith BrookAlice Barham (uncredited) | Alice Barham (uncredited) |
| VViolet CampbellMrs. Barham (uncredited) | Mrs. Barham (uncredited) |
 Leonard CareyThe McLaidlaw's Butler Burton (uncredited) | The McLaidlaw's Butler Burton (uncredited) |
 David ClydeTrunk Man (uncredited) | Trunk Man (uncredited) |
 Clyde CookPhotographer (uncredited) | Photographer (uncredited) |
 Alec CraigHogarth Club Desk Clerk (uncredited) | Hogarth Club Desk Clerk (uncredited) |
| CCarol Curtis-BrownJessie Barham (uncredited) | Jessie Barham (uncredited) |
 Vernon DowningBenson (uncredited) | Benson (uncredited) |
 Rex EvansMr. Bailey (uncredited) | Mr. Bailey (uncredited) |
 Edward FieldingAntique Shop Proprietor (uncredited) | Antique Shop Proprietor (uncredited) |
 Gavin GordonDr. Bertram Sedbusk (uncredited) | Dr. Bertram Sedbusk (uncredited) |
 Lumsden HareInspector Hodgson (uncredited) | Inspector Hodgson (uncredited) |
 Alfred HitchcockMan Mailing Letter (uncredited) | Man Mailing Letter (uncredited) |
 Gertrude HoffmannMrs. Wetherby (uncredited) | Mrs. Wetherby (uncredited) |
| KKenneth HunterSir Gerald (uncredited) | Sir Gerald (uncredited) |
| DDorothy LloydMiss Wetherby (uncredited) | Miss Wetherby (uncredited) |
 Aubrey MatherExecutor of General Laidlaw's Will (uncredited) | Executor of General Laidlaw's Will (uncredited) |
| NNondas MetcalfPhyllis Swinghurst (uncredited) | Phyllis Swinghurst (uncredited) |
 Rita PageSecretary (uncredited) | Secretary (uncredited) |
