Robert Donat as Sir Robert Morton

Cedric Hardwicke as Arthur Winslow

Margaret Leighton as Catherine Winslow

Basil Radford as Desmond Curry

Kathleen Harrison as Violet

Francis L. Sullivan as Attorney General

Marie Lohr as Grace Winslow

Jack Watling as Dickie Winslow

Walter Fitzgerald as First Lord

Frank Lawton as John Watherstone

Neil North as Ronnie Winslow

Nicholas Hannen as Col. Watherstone

Mona Washbourne as Miss Barnes

Stanley Holloway as Comico

Wilfrid Hyde-White as Wilkinson

Evelyn Roberts as Hamilton MP

W.A. Kelley as Brian O'Rourke

Edward Lexy as First Elderly Member

Vera Cook as Violet's friend

Hugh Dempster as Agricultural Member

Gordon McLeod as 2nd. Elderly Member - Smoking Room

Ivan Samson as Captain Flower

Kynaston Reeves as Lord Chief Justice

Charles Groves as Clerk of the Court

Ernest Thesiger as Mr. Ridgeley Pierce

Cyril Ritchard as Himself

Lewis Casson as Adm. Springfield (uncredited)

Colin Gordon as Reporter Interviewing Dickie (uncredited)

Mary Hinton as Mrs. Elliott (uncredited)

David Horne as Bank Manager (uncredited)

Noel Howlett as Mr. Williams (uncredited)

Aubrey Mallalieu as Mr. Roberts (uncredited)

Dandy Nichols as Miss Hawkins (uncredited)

Philip Ray as First Speaking Member (uncredited)

Bill Shine as Fred (uncredited)

Frank Tickle as Mr. Gunn (uncredited)

Margaret Withers as Mrs. Jordan (uncredited)