Philippine Élisabeth d'Orléans known as Mademoiselle de Beaujolais (Philippine Élisabeth Charlotte; 18 December 1714 – 21 May 1734) was the daughter of Philippe d'Orléans, duc d'Orléans (Regent from 1715 to 1723) and his wife, Françoise-Marie de Bourbon, the youngest legitimised daughter of King Louis XIV and his mistress, Madame de Montespan. As a member of the reigning House of Bourbon, and of the House of Orléans, Philippine Élisabeth was a Princesse du Sang. She died of smallpox at the age of nineteen.

Philippine Élisabeth Charlotte d'Orléans was born at the Palace of Versailles. She was the fifth living daughter of her parents and was known as Mademoiselle de Beaujolais in her youth. Brought up in a convent with her younger sister, Louise Diane d'Orléans, she grew up in the era of the Régence. She was named after her paternal grandparents, Philippe de France and Elizabeth Charlotte of the Palatinate. One of eight children, she was the sister of:

Her paternal grandmother, Elizabeth Charlotte of the Palatinate was warmly attached to her granddaughter and very devoted to her; she used to visit her almost every day at the Palais-Royal in Paris. Her maternal grandmother was Madame de Montespan, who had died in 1707, seven years before the birth of Philippine.

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