| Marie Louise of Hesse-Kassel | |||||
|---|---|---|---|---|---|
 Portrait by Lancelot Volders, c. 1710 | |||||
| Princess consort of Orange | |||||
| Tenure | 1709–1711 | ||||
| Regent of the Netherlands | |||||
| 1st Regency | 1711 - 1730 | ||||
| Monarch | William IV | ||||
| 2nd Regency | 1759 - 1765 | ||||
| Monarch | William V | ||||
| Co-Regent | Duke Louis Ernest (1759-1765) | ||||
| Born | 7 February 1688 Kassel | ||||
| Died | 9 April 1765 (aged 77) Leeuwarden, The Netherlands | ||||
| Burial | Grote of Jacobijnerkerk in Leeuwarden | ||||
| Spouse | |||||
| Issue | Amalia, Hereditary Princess of Baden-Durlach William IV, Prince of Orange | ||||
| |||||
| House | Hesse-Kassel | ||||
| Father | Charles I, Landgrave of Hesse-Kassel | ||||
| Mother | Princess Maria Amalia of Courland | ||||
Marie Louise of Hesse-Kassel (7 February 1688 – 9 April 1765) was a Dutch regent, Princess of Orange by marriage to John William Friso, Prince of Orange, and regent of the Netherlands during the minority of her son and her grandson. She was a daughter of Charles I, Landgrave of Hesse-Kassel, and Maria Amalia of Courland.
From the end of World War II in 1945 until 2022, Marie Louise and her husband were the most recent common ancestors of all reigning hereditary monarchs in Europe.[citation needed]
Marie Louise is notable for having served as regent for two periods in Dutch history: during the reigns of her young son, William IV, Prince of Orange from 1711 and 1730, and of her young grandson, William V, Prince of Orange, from 1759 to 1765. She was often fondly referred to as Marijke Meu (Aunt Mary) by her Dutch subjects.