The Prime Minister

John Gielgud Disraeli

Diana Wynyard Mary Anne

Will Fyffe The Agitator

Owen Nares Lord Derby

Fay Compton Queen Victoria

Pamela Standish Princess Victoria

Stephen Murray Mr. Gladstone

Frederick Leister Lord Melbourne

Nicholas Hannen Sir Robert Peel

Anthony Ireland Count D'Orsay

Irene Browne Lady Londonderry

Joss Ambler Earl of Carnarvon (uncredited)

Hugh Bickett (uncredited)

Vera Bogetti Lady Blessington (uncredited)

Barbara Everest Baroness Lehzen (uncredited)

Lyn Harding Bismarck (uncredited)

Glynis Johns Miss Sheridan (uncredited)

Margaret Johnston Miss Sheridan (uncredited)

Nadine March Mary Anne's maid (uncredited)

Gordon McLeod John Brown (uncredited)