Élisabeth Charlotte d'Orléans (13 September 1676 – 23 December 1744) was a French petite-fille de France and by marriage to Leopold, Duke of Lorraine, duchess and later regent of Lorraine and Bar. She was also suo jure Princess of Commercy. Among her children was Francis I, Holy Roman Emperor, a co-founder of the House of Habsburg-Lorraine.
Élisabeth Charlotte was born at the Château de Saint-Cloud outside Paris. She was the daughter of Philippe I, Duke of Orléans, Monsieur, and of his second wife, Elizabeth Charlotte of the Palatinate, Madame, the daughter of Charles I Louis, Elector Palatine. Her father was the only sibling of King Louis XIV of France. As a petite-fille de France, she was entitled to have the style of Her Royal Highness, as well as the right to an armchair in the presence of the King.
The Duchess of Berry was then at the peak of her influence and power at the court of her father, the Regent. The proud and beautiful young widow soon met a shameful and premature end. She became pregnant, allegedly by the lieutenant of her guard, and almost died in labour at the Luxembourg, just one year after the splendid party she had given her visiting aunt. Being denied the holy sacraments by the Church, she was finally delivered of a stillborn daughter. Unable to recover from her scandalous and harrowing childbirth, the princess expired in July 1719 and was found to be again pregnant.  Marie Louise Élisabeth d'Orléans