Catherine Sedley, Countess of Dorchester
The Countess of Dorchester The Countess of Portmore | |
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The Countess of Dorchester, painted by Sir Peter Lely, c. 1675. | |
| Known for | Mistress of James II of England |
| Born | 21 December 1657 |
| Died | 26 October 1717 Bath, England |
| Buried | Church of St James, Weybridge |
| Spouse(s) | David Colyear, 1st Earl of Portmore |
| Issue | David Colyear, Viscount Milsington Charles Colyear, 2nd Earl of Portmore Catherine Sheffield, Duchess of Buckingham and Normanby James Darnley |
| Father | Sir Charles Sedley, 5th Baronet |
| Mother | Lady Catherine Savage |
Catherine Colyear, suo jure Countess of Dorchester and Countess of Portmore (née Sedley; 21 December 1657 – 26 October 1717), was an English noble and courtier. She was the mistress of King James II of England both before and after he came to the throne. Catherine was noted not for beauty but for her celebrated wittiness and sharp tongue.