Philippe François Armand Marie de Noailles, Duc de Mouchy, Prince-Duc de Poix (17 April 1922 – 28 February 2011) was a cadet of the French ducal house of Noailles (created dukes and peers of France in 1663 by Louis XIV), and second in succession to the senior title. He was the eldest son of Henri-Antoine-Marie de Noailles, Duc de Mouchy, Prince-Duc de Poix, and of Marie de La Rochefoucauld. Following his marriage to Joan Dillon, he became managing director of Domaine Clarence Dillon. Together, the couple acquired Château La Mission Haut-Brion, Château Laville Haut-Brion and Château La Tour Haut-Brion.