You can help expand this article with text translated from the corresponding article in French. (January 2018) Click [show] for important translation instructions. View a machine-translated version of the French article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing French Wikipedia article at [[:fr:Louis Hippolyte Leroy]]; see its history for attribution. You may also add the template {{Translated|fr|Louis Hippolyte Leroy}} to the talk page. For more guidance, see Wikipedia:Translation.

Louis Hippolyte Leroy (1763–1829) was a French fashion merchant who founded the House of Leroy, one of the foremost fashion houses of the early 19th century First Empire Paris. He is known as the favorite fashion trader and the official fashion designer of empress Josephine de Beauharnais. He was very successful and also provided dresses for several other royal and Princely courts in Europe during the early 19th century.

The son of a machinist of the Royal Opera, he was trained to be a hairdresser and employed at the Royal court of Versailles.

In 1804, he provided the empress with her coronation costume, which founded his career as a successful fashion trader of the Parisian high society, eventually making himself a millionaire.

During the First Empire, he was a favorite designer of gowns for Empress Joséphine and the women of the Imperial court of Napoleon I, while Madame Herbault made their hats and accessories.^[1]

According to Imbert de Saint Amand, Leroy did not actually design the costumes he sold; in fact, he bought the models from designers such as Louis-Philibert Debucourt, Jean-Baptiste Isabey and Auguste Garneray, and simply sold them on to his costumers.^[2]