Henri de Lorraine (20 March 1601 – 25 July 1666, Royaumont Abbey), known as Cadet la Perle, was a French nobleman.

He was the younger son of Charles I, Duke of Elbeuf and his wife Marguerite de Chabot, countess of Charny.

Harcourt first saw active duty at the siege of Prague in November 1620, and because of his bravery he was nicknamed Cadet la Perle by his companions after the pearl he wore in his ear.

He was made a knight in the Order of the Holy Spirit in 1633, Grand Squire of France in 1643 and Seneschal of Burgundy.

In 1637, he fought in Piedmont during the Franco-Spanish War (1635–1659), where he defeated a Spanish army, very superior in numbers, near Chieri.