Overview
Louise Julie de Mailly-Nesle, comtesse de Mailly (; 1710–1751) was the eldest of the five famous de Nesle sisters, four of whom would become the mistress of King Louis XV of France. She was first the mistress of the Marquis de Puysieux and then of Louis XV from 1732 until 1742, and his official mistress from 1738 until 1742.
Early life, family and marriage
Louise Julie was born the eldest 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 an lady-in-waiting in service to the queen from 1725, and her father reportedly "wasted his substance on actresses and the capacious requirements of Court life".
Louise Julie had four younger full sisters:
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