|Keira Knightley||Georgiana Spencer, Duchess of Devonshire|
|Ralph Fiennes||The Duke of Devonshire|
|Charlotte Rampling||Lady Spencer|
|Dominic Cooper||Charles Grey|
|Simon McBurney||Charles Fox|
|Aidan McArdle||Richard Sheridan|
|John Shrapnel||Gen. Grey|
Though adored by the people, the Duchess of Devonshire is not content to sit as a pretty figurehead. Determined to be a major player in affairs of state, she rises to the forefront of the Whig Party and helps usher in reform in late-1700s England. The one thing it seems she cannot do is win the heart of her husband .