Henriette-Lucy, Marquise de La Tour-du-Pin-Gouvernet (25 February 1770, Paris – 2 April 1853, Pisa), (also known as Lucie), was a French aristocrat famous for her posthumously published memoirs entitled Journal d'une femme de 50 ans. The memoirs are a first-hand account of her life through the Ancien Régime, the French Revolution, and the Imperial court of Napoleon, ending in March 1815 with Napoleon's return from exile on Elba. Madame de la Tour du Pin, as she is frequently called, was a witness to the private lives of the royals, and her memoirs serve as unique testimony to much unchronicled history.
Henriette-Lucy Dillon was born into a prominent Irish Wild Geese Jacobite military family in France. She was daughter of Arthur Dillon, colonel-proprietor of the Dillon Regiment. and his first wife Therese-Lucy de Rothe (1751–1782). Her father had been born in England, so she was often regarded in France as English. However the family, of Norman descent, was linked to the Dillons of Costello-Gallen and the lords of Drumraney in Ireland, who were granted lands in County Westmeath in the thirteenth-century. Following her mother's death and her father's subsequent posting abroad, where he remarried, Lucie lived in the household of her grandmother, Mme. de Rothe, and Arthur Richard Dillon, Archbishop of Narbonne, until joining the Court of France. She married Frédéric, comte de Gouvernet, later Marquis de La Tour-du-Pin, an army officer and diplomat, in 1787. He was the son of Jean-Frédéric de la Tour du Pin-Gouvernet, a French Minister of War.