Court career
In 1661–1664, she was governess to the dauphin.
In 1664, she was appointed Première dame d'honneur to the queen. In this position, she is known for the complaisant role she played in assisting the king and his mistresses, though she officially stated her condemnation of the adultery.
During the trip to Flanders, she officially stated her shock at the behavior of Louise de La Vallière, when the affair between her and the king was exposed.
A scandal arose when Julie d'Angennes was accused of acting as a go-between between the king and Madame de Montespan in order to secure the governorship of the Dauphin for her husband.[1]
Julie d'Angennes was a personal friend of Madame de Montespan, and as they were both ladies-in-waiting, often shared sleeping quarters with her as the followed the royal court between the royal palaces. She shared her chambers with Montespan in Avesnes, when the king was known to visit Montespan in her bed chamber, and the affair between the king and Montespan started. An anonymous letter, which was sent to the queen, stated that the king was no longer in love with Louise de La Vallière but had begun an affair with Madame de Montespan, and that duchesse de Montausier was their accomplice. de Montausier successfully expressed her denial and rage on being accused of such a thing, and the queen stated that she refused to believe the letter.
She was blamed by Louis Henri de Pardaillan, Marquis of Montespan for assisting in the affair between the king and his wife, Madame de Montespan. In 1668, when her spouse was appointed governor to the dauphin, which was by some seen as payment for the role his wife played in the king's love life, the husband of Madame de Montespan stormed in to Julie d'Angennes and publicly blamed her for her role in the adultery of his wife. This scene deeply affected Julie d'Angennes, who was already suffering from nervous problems, and in late 1669, she announced her retirement from court service and left for the country, though an appointment for her replacement was not made until two years later.