Noël Coward

Captain E. V. Kinross R.N. / Captain 'D'

John Mills

Ordinary Seaman Blake / Shorty Blake

Bernard Miles

Chief Petty Officer Hardy / Walter Hardy

Celia Johnson

Mrs. Kinross / Alix

Kay Walsh

Freda Lewis / Freda

Joyce Carey

Mrs. Hardy / Kath

Michael Wilding

Flags

Philip Friend

Torps

Ballard Berkeley

Engineer Commander

Hubert Gregg

Pilot

James Donald

Doc

Richard Attenborough

Young Stoker

Frederick Piper

Edgecombe

Leslie Dwyer

Parkinson

John Singer

Moran

Johnnie Schofield

Coxswain

Walter Fitzgerald

Colonel Lumsden

Daniel Massey

Bobby Kinross

Ann Stephens

Lavinia Kinross

Kathleen Harrison

Mrs. Blake

Dora Gregory

Mrs. Lemmon

Penelope Dudley-Ward

Maureen

Kay Young

Barmaid

George Carney

Mr. Blake

Michael Anderson

Albert Fosdick

Everley Gregg

Nurse

Juliet Mills

Freda's Baby

Leslie Howard

Narrator (voice) (uncredited)