Maurice Quentin de La Tour (French pronunciation: [mɔʁis kɑ̃tɛ̃ də la tuʁ]; 5 September 1704 – 17 February 1788) was a French painter who worked primarily with pastels in the Rococo style. Among his most famous subjects were Voltaire, Rousseau, Louis XV and the Madame de Pompadour.
https://en.wikipedia.org/wiki/Maurice_Quentin_de_La_Tour
More Mo’: https://artvee.com/artist/maurice-quentin-de-la-tour/
It is a self portrait. They didn’t have TV back then, he could easily have devoted dozens of hours to painting himself as a sexy guy just for grins.