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)