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)
Carol Reed
Director
R. E. Dearing
Editor
Sidney Gilliat
Screenplay
Louis Levy
Music Director
B. C. Sewell
Sound Director
Alex Vetchinsky
Art Direction
Cecil Beaton
Costume Design
Viscount Castlerosse
Additional Dialogue
Elizabeth Haffenden
Costume Design
Edward Black
Producer
Maurice Ostrer
Producer
Biddy Chrystal
Hairstylist
Charles Williams
Music
Frank Launder
Screenplay
Freddie Young
Director of Photography