Marie Caroline Gibert de Lametz, (18 July 1793, Coulommiers – 25 November 1879, Monaco), was a French stage actress and later Princess Consort and regent de facto of Monaco, the spouse of Florestan I, Prince of Monaco. She was the daughter of Charles-Thomas Gibert (1765–18??) and his wife, Marie-Françoise Le Gras de Vaubercey (1766–1842), and the adopted stepdaughter of Antoine Rouyer de Lametz (1762–1836), Chevalier d'Empire and Knight of the Legion of Honour. She is the paternal granddaughter of Thomas Gibert and his wife, Françoise Moret, and the maternal granddaughter of François Louis Michel Le Gras de Vaubercey and his wife, Gabrielle Françoise des Courtils. Marie Caroline was originally a stage actress. The marriage of her parents ended in divorce.