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Elizabeth Wrottesley (1745–1822) was the Duchess of Grafton. She married Augustus FitzRoy, 3rd Duke of Grafton (sometime duke and prime minister) on 24 June 1769 at Woburn Abbey in Bedfordshire, England. Wrottesley was the child of Sir Richard Wrottesley, 7th Baronet. Wrottesley's portrait was painted by Thomas Gainsborough and hangs in the National Gallery of Victoria in Melbourne.