If you're looking for a costume idea, here are some of the best! ... If you want to make your own, the original website has design specifications

Original Keira Knightley and Ralph Fiennes costumes from The Duchess...

In The Duchess, Keira Knightley plays 'Georgiana Spencer' who became 'The Duchess of Devonshire' in Great Britain when she married 'William Cavendish, The 5th Duke of Devonshire' (played by Ralph Fiennes) in 1774.  

Oscar-Winning 18th century movie costumes from The Duchess
The Duchess 18th century period movie costumes
'Georgiana' is spirited aristocrat who lived during a period at the height of fashion, decadence and political change. Did you know that Diana Princess of Wales was a direct descendent of The Duchess, and was born Lady Diana Spencer.

The Duchess movie poster
The Duchess movie poster
These two authentic looking and opulent 18th Century movie costumes inspired by the Georgian period were photographed on display at Arclight Hollywood on September 28, 2008.

The Duchess Oscar-Winning movie costumes on 
display at ArcLight Hollywood cinema
The Duchess original movie costume display at ArcLIght Hollywood
In what became a loveless marriage The Duchess fell in love with 'Charles Grey', future Prime Minister, played by Dominic Cooper (who played 'Sky' in Mamma Mia: The Movie).

The actual costumes worn by Ralph Fiennes 
and Keira Knightley in The Duchess
The Duchess original film costumes worn by Ralph Fiennes and Keira Knightley
The two costumes on display were designed by Michael O'Connor, for which he won his first Oscar for Best Costume Design at the 81st Annual Academy Awards

On the left is the outfit worn by Ralph Fiennes when the Duke discusses the marriage contract with 'Lady Spencer'.

Men's clothing was worn very fitted at the time and the green velvet tailcoat and matching breeches are paired with a steely grey silk waistcoat.

On the right is 'Georgiana's' beautiful Wedding Dress of cream silk, with sack back and diamond decorated stomacher.

The Duchess movie poster
The Duchess film poster
Visit the official website for The Duchess for even more fabulous costumes and even get to see them in 3D.

Visit Jason in Hollywood for a movie review of The Duchess.

Buy the DVD in the USA: The Duchess