Jacqueline Marval was the pseudonym for Marie Josephine Vallet (1866–1932), a French painter, lithographer, and sculptor.
Vallet was born 19 October 1866, in Quaix-en-Chartreuse into a family of schoolteachers. She separated from her husband in 1891 and earned a living making waistcoats.
In 1894, she met the painter François Joseph Girot and began living with him in Paris as his lover. The next year, she met Jules Flandrin, another painter and a student of Gustave Moreau. The two fell in love, and Vallet left Girot to move in with Flandrin in Rue Campagne-Première, in the Montparnasse area. She would live with him as his companion and mistress for 20 years.
Vallet's first works were rejected from the 1900 Salon des Indépendants, but she succeeded in having a dozen paintings shown in that exhibition the following year, under the pseudonym of Jacqueline Marval. The art dealer Ambroise Vollard bought them all.
In 1902, several of her paintings were displayed alongside works by Flandrin, Albert Marquet, and Henri Matisse in a gallery in Rue Victor-Massé curated by Berthe Weill, who was particularly interested in promoting the works of female artists living in Paris.
In 1911, Marval was chosen by a jury made up of Gabriel Astruc, the sculptor Antoine Bourdelle, and the painters Maurice Denis and Édouard Vuillard to decorate the foyer of the new Théâtre des Champs-Élysées. She created a series of twelve paintings on the theme of Daphnis and Chloe, completing them in 1913. The same year, she protested against the removal from the Salon d'Automne of Kees van Dongen's The Spanish Shawl, and became friends with van Dongen, setting up her studio near his.