Sir Andrew Dudley, KG (c. 1507 – 1559) was an English soldier, courtier, and diplomat. A younger brother of John Dudley, 1st Duke of Northumberland, he served in Henry VIII's navy and obtained court offices under Edward VI. In 1547–1548 he acted as admiral of the fleet and participated in the War of the Rough Wooing in Scotland, where he commanded the English garrison of Broughty Castle. He was appointed captain of the fortress of Guînes in the Pale of Calais in late 1551. There he got involved in a dispute with the Lord Deputy of Calais, which ended only when both men were replaced in October 1552.