Robert Donat

William Pitt / The Earl of Chatham

Robert Morley

Charles James Fox

Phyllis Calvert

Eleanor Eden

John Mills

William Wilberforce

Jean Cadell

Mrs. Sparry

Raymond Lovell

George the Third

Felix Aylmer

Lord North

Max Adrian

Richard Sheridan

John Salew

Smith

Herbert Lom

Napoleon

Albert Lieven

Talleyrand

Frank Pettingell

Coachman

Leslie Bradley

Gentleman Jackson

Roy Emerton

Dan Mendoza

Hugh McDermott

Mr. Melvill

Kathleen Byron

Millicent Grey (uncredited)

Leo Genn

Danton (uncredited)

Esma Cannon

Servant at Lord Auckland's

Leslie Dwyer

Servant at Lord Auckland's

Peter Gawthorne

Admiral

Muriel George

Mrs. Carr

Morland Graham

David Horne

Mayor

James Kenney

Aubrey Mallalieu

Somerset

Gibb McLaughlin

George Selwyn

Esme Percy

Kynaston Reeves

J.H. Roberts

Johnnie Schofield

John Slater

Austin Trevor

French Registrar

Frederick Valk

Jack Watling

Atkinson

Edmund Willard