At the death of her father, in 1608, Marie became the Duchess of Montpensier in her own right; the Duchy was one of the oldest in France having been elevated from a County in 1539.

Marie was a descendant of John II of France, of the House of Valois and of Saint Louis.

According to her daughter's biographer, Vita Sackville-West, quoting a member of her husband's household, A sadder wedding was never seen..[2] From this union, the new ducal couple had one child: Marie died on 4 June 1627 at the Palais du Louvre in Paris, at the age of twenty-one, shortly after the birth of her daughter who, as her only child, inherited her fortune and titles.

[5][6] After the death of her daughter, La Grande Mademoiselle, in 1693, Marie's fortune was handed over to Philippe de France, Louis XIV's younger and only brother.

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