[2] As a young man he entered the École nationale supérieure des arts décoratifs where he studied drawing nudes from models and after academics.

In 1892 he was then admitted to the École nationale supérieure des Beaux-Arts on the Rue Bonaparte, where he studied in the studio of Léon Bonnat (1833-1922).

He won the first Grand Prix de Rome in June 1894 with Judith presenting the Head of Holofernes to the people of Bethulia.

[5] He left for Italy for three years of study at the Villa Medici in Rome from 1895 to 1898, accompanied by the painter Adolphe Déchenaud and musician Henri Rabaud.

In 1908 he moved with his wife to a large house in the Quartier du Petit-Montrouge, in the 14th arrondissement of Paris, Villa d'Alesia.

He was a professor at the École nationale supérieure des Beaux-Arts in Paris for 30 years, a jury member of the committee of French Artists Society in 1904, an art teacher at the Académie de la Grande Chaumière, and was made a knight of the Legion of Honor.

A plate decorated with a medallion portrait by Spanish sculptor Enrique Pérez Comendador is affixed to his house at 11 Villa d'Alesia.

[9] Auguste Leroux was a great success as an illustrator of works by authors such as Giacomo Casanova, Joris-Karl Huysmans, Honoré de Balzac, Gustave Flaubert, Stendhal and Anatole France.

A skilled lithographer, he worked with the greatest engravers of his time including Gusman, Eugène Decisy [fr], Raoul Serres, Florian and Perrichon.

His younger brother Georges Paul Leroux (3 August 1877 – 16 February 1957) was also a brilliant artist who won the Prix de Rome in painting in 1906 and was a member of the Académie des beaux-arts.

She continued her training at the Casa de Velázquez in Madrid, and in 1931 married in Paris the Spanish sculptor Enrique Pérez Comendador (1900–1981).

Among his major works were: David victorious over Goliath - 1932; Christ at the Sepulchre - 1933 Ophelia - 1934; Into the Light - 1936; Phantom of Glory - 1938 (after a poem by Alphonse de Lamartine).