Cast
- Keira Knightley as Georgiana Cavendish, Duchess of Devonshire
- Hayley Atwell as Bess Foster
- Dominic Cooper as Charles Grey
- Simon McBurney as Charles Fox
- John Shrapnel as General Grey
- Ralph Fiennes as Duke of Devonshire
- Charlotte Rampling as Lady Spencer
- Alistair Petrie as Heaton
- Justin Edwards as Macaroni
- Richard McCabe as Sir James Hare
- Patrick Godfrey as Dr. Neville
- Aidan McArdle as Richard Brinsley Sheridan
- Calvin A. Dean as Devonshire House Servant (as Calvin Dean)
- Michael Medwin as Speechmaker
- Hannah Stokely as Devonshire House Maid