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)