Wendy Hiller as Major Barbara Undershaft

Rex Harrison as Adolphus Cusins

Robert Morley as Andrew Undershaft

Robert Newton as Bill Walker

Sybil Thorndike as The General

Emlyn Williams as Snobby Prince

Marie Lohr as Lady Britomart

Penelope Dudley-Ward as Sarah Undershaft

Walter Hudd as Stephen Undershaft

David Tree as Charles Lomax

Deborah Kerr as Jenny Hill

Donald Calthrop as Peter Shirley

Marie Ault as Rummy Mitchens

Cathleen Cordell as Mog Habbijam

Torin Thatcher as Todger Fairmile

Miles Malleson as Morrison

Felix Aylmer as James

Stanley Holloway as Policeman

S.I. Hsiung as Ling

Kathleen Harrison as Mrs. Price

Mary Morris as A Girl

Charles Victor as Bilton (uncredited)

O.B. Clarence as Pettigrew (uncredited)

Dane Gordon as Cast Member (uncredited)

Edward Rigby as Man on Quayside (uncredited)

George Bernard Shaw as Himself (in theatrical release print only) (uncredited)

Billy Wells as Minor Role (uncredited)