Marie Anne de Mailly-Nesle, duchesse de Châteauroux (; 5 October 1717 – 8 December 1744) was the youngest of the five famous de Nesle sisters, four of whom would become the mistress of King Louis XV of France. She was his mistress from 1742 until 1744. Early life, family and marriage Marie Anne was born the youngest daughter of Louis de Mailly, Marquis de Nesle et de Mailly, Prince d'Orange (1689 - 1767), and Armande Félice de La Porte Mazarin (1691 - 1729). Her parents had been married in 1709. Her mother was the daughter of Paul Jules de La Porte, duc Mazarin et de La Meilleraye (1666 - 1731), the son of the famous adventuress, Hortense Mancini, the niece of Cardinal Mazarin. Her mother was a lady-in-waiting in service to the queen, and her father reportedly "wasted his substance on actresses and the capacious requirements of Court life". Marie Anne had four older full sisters: Louise Julie de Mailly, Mademoiselle de Mailly, comtesse de Mailly (1710 - 1751), Pauline Félicité de Mailly, Mademoiselle de Nesle, marquise de Vintimille (1712 - 1741), Diane Adélaïde de Mailly, Mademoiselle de Montcavrel, duchesse de Lauraguais (1714 - 1769), Hortense Félicité de Mailly, Mademoiselle de Chalon, marquise de Flavacourt (1715 - 1799). The only one of the de Nesle sisters not to become one of Louis XV's mistresses was the Marquise de Flavacourt. Louise Julie was the first sister to attract the king followed by Pauline Félicité, but it was Marie Anne who was the most successful in manipulating him and becoming politically powerful. Marie Anne also had a younger half-sister, Henriette de Bourbon (1725 - 1780), Mademoiselle de Verneuil, from her mother's relationship with the duc de Bourbon, the chief minister of Louis XV from 1723 to 1726. In her youth, Marie Anne was known as Mademoiselle de Monchy. On 19 June 1734, she married Jean Baptiste Louis, marquis de La Tournelle (1708-1740). She was a friend of Charlotte Aglaé d'Orléans, granddaughter of Louis XIV and Madame de Montespan. Royal Mistress Introduction In 1732, Marie Anne's oldest sister Louise Julie, who had succeeded their mother as lady-in-waiting to the queen, caught the attention of King Louis XV, and was permitted by her spouse to become a royal mistress. Although she became the king's mistress in 1732, Louise Julie was not officially recognized as his maîtresse en titre until 1738. Louise Julie did not