Robert Donat

William Pitt / The Earl of Chatham

Robert Morley

Charles James Fox

Phyllis Calvert

Eleanor Eden

John Mills

William Wilberforce

Geoffrey Atkins

William Pitt, as a boy

Jean Cadell

Mrs. Sparry

Raymond Lovell

George the Third

Agnes Lauchlan

Queen Charlotte

Felix Aylmer

Lord North

Ian McLean

Dundas

Max Adrian

Richard Sheridan

A. Bromley Davenport

Sir Evan Nepean

John Salew

Smith

Herbert Lom

Napoleon

Albert Lieven

Talleyrand

Stephen Haggard

Lord Nelson

Stuart Lindsell

Earl Spencer

Henry Hewitt

Addington

Frederick Culley

Sir Wm. Farquhar

Frank Pettingell

Coachman

Leslie Bradley

Gentleman Jackson

Roy Emerton

Dan Mendoza

Hugh McDermott

Mr. Melvill

Alfred Sangster

Lord Grenville

Kathleen Byron

Millicent Grey (uncredited)

Leo Genn

Danton (uncredited)

Hugh Ardale

Naval Officer

Neal Arden

Johnny Brandon

Esma Cannon

Servant at Lord Auckland's

H. Carleton-Crowe

Old Man

Leslie Dwyer

Servant at Lord Auckland's

Philip Friend

Peter Gawthorne

Admiral

Muriel George

Mrs. Carr

Alf Goddard

Morland Graham

James Harcourt

Bellamy

Billy Holland

W.E. Holloway

David Horne

Mayor

Gordon James

James Kenney

Max Kirby

3rd Secretary

Frederick Leister

Lord Auckland

Aubrey Mallalieu

Somerset

Gibb McLaughlin

George Selwyn

Gertrude Maesmore Morris

Lady in Waiting

Charles Paton

Lloyd Pearson

Esme Percy

Kynaston Reeves

Owen Reynolds

J.H. Roberts

Ralph Roberts

Johnnie Schofield

Ronald Shiner

Man in Stocks

John Slater

Ann Stephens

Merle Tottenham

Maid at Lord Auckland's

Austin Trevor

French Registrar

Grant Tyler

Boy

Frederick Valk

Margaret Vyner

Duchess of Devonshire

Jack Watling

Atkinson

Edmund Willard

D.J. Williams

Bruce Winston