Edward VI (12 October 1537 - 6 July 1553) became King of England and Ireland on 28 January 1547 and was crowned on 20 February at the age of nine. The son of Henry VIII and Jane Seymour, Edward was the third monarch of the Tudor dynasty and England's first Protestant ruler. During Edward’s reign, the realm was governed by a Regency Council, because he never reached maturity. The Council was led from 1547 to 1549 by his uncle Edward Seymour, 1st Duke of Somerset, and from 1550 to 1553 by John Dudley, 1st Earl of Warwick, who in 1551 became 1st Duke of Northumberland.