Madame Elizabeth Charlotte, Duchess of Orléans, also known as Liselotte von der Pfalz, was a German member of the House of Wittelsbach who married into the French royal family. She was the second wife of Monsieur Philippe I, Duke of Orléans. By Philippe, Liselotte was the mother of Philippe II, Duke of Orléans, and Élisabeth Charlotte, Duchess of Lorraine. Philippe II was France's ruler during the Regency. Liselotte gained literary and historical importance primarily through preservation of her correspondence, which is of great cultural and historical value due to her sometimes very blunt descriptions of French court life and is today one of the best-known German-language texts of the Baroque period.

Monsieur Philippe I, Duke of Orléans was the younger son of King Louis XIII of France and Anne of Austria, and the younger brother of King Louis XIV. He was the founder of the House of Orléans, a cadet branch of the ruling House of Bourbon.