Mary Dudley

Lady Mary Dudley
Mary Sidney by Hans Eworth, c. 1550–1555
Born	c. 1530–1535
Died	9 August 1586 London, England
Buried	Penshurst Place, Kent
Noble family	Dudley
Issue	Sir Philip Sidney Mary Margaret Sidney Elizabeth Sidney Mary Herbert, Countess of Pembroke Robert Sidney, 1st Earl of Leicester Ambrosia Sidney Sir Thomas Sidney
Father	John Dudley, 1st Duke of Northumberland
Mother	Jane Guildford
Occupation	Lady-in-Waiting

Lady Mary Sidney (née Dudley; c. 1530–1535^[1] – 9 August 1586) was a lady-in-waiting at the court of Elizabeth I, wife of Sir Henry Sidney and the mother of Sir Philip Sidney and Mary Sidney Herbert, Countess of Pembroke. She was daughter of John Dudley, Duke of Northumberland, and sister of Elizabeth's favourite, Robert Dudley, Earl of Leicester.

Although she was marginally implicated in her father's attempt to place Lady Jane Grey on the English throne and affected by his attainder, Mary Dudley was one of Queen Elizabeth's most intimate confidantes during the early years of her reign. Her duties included nursing the Queen through smallpox in 1563 and acting as her mouthpiece towards diplomats. She was the mother of seven children and accompanied her husband, Sir Henry Sidney, to Ireland and the Welsh Marches. From the 1570s the couple complained repeatedly about their, as they saw it, poor treatment at the Queen's hands. Still one of Elizabeth's favourite ladies, Mary Dudley retired from court life in 1579, suffering from ill health during her last years.