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

Henry Hewitt

Addington

Frank Pettingell

Coachman

Leslie Bradley

Gentleman Jackson

Roy Emerton

Dan Mendoza

Hugh McDermott

Mr. Melvill

Kathleen Byron

Millicent Grey (uncredited)

Leo Genn

Danton (uncredited)