Elizabeth Cavendish, Duchess of Devonshire

Her Grace The Duchess of Devonshire
Bess in 1787, painted by Sir Joshua Reynolds
Born	(1758-05-13)13 May 1758 Horringer, Suffolk, England
Died	30 March 1824(1824-03-30) (aged 65) Rome, Papal States
Title	Lady Elizabeth Foster Duchess of Devonshire
Spouses	John Thomas Foster ​ ​ (m. 1776; sep. 1781)​ William Cavendish, 5th Duke of Devonshire ​ ​ (m. 1809; died 1811)​
Children	Frederick Foster Sir Augustus Foster, Bt Elizabeth Foster, Sir Augustus Clifford, Bt Caroline St Jules
Parents	Frederick Hervey, 4th Earl of Bristol Elizabeth Davers

Elizabeth Christiana Cavendish, Duchess of Devonshire (née Hervey; 13 May 1758 – 30 March 1824) was an English aristocrat and letter writer. She is best known as Lady Elizabeth Foster, the close friend of Georgiana Cavendish, Duchess of Devonshire. Elizabeth supplanted the Duchess, gaining the affections of William Cavendish, 5th Duke of Devonshire and later marrying him.^[1] Several of her letters are preserved.