Maurice Utrillo, born Maurice Valadon, (26 December 1883 - 5 November 1955) was a French painter who specialized in cityscapes. Born in the Montmartre quarter of Paris, France, Utrillo is one of the few famous painters of Montmartre who were born there.

Utrillo was the son of the artist Suzanne Valadon (born Marie-Clémentine Valadon), who was then an eighteen-year-old artist's model. She never revealed who had been the father of her child; speculation exists that he was the offspring from a liaison with an equally young amateur painter named Boissy, or with the well established painter, Pierre-Cécile Puvis de Chavannes, or even with Renoir (see below under Utrillo's Paternity). In 1891 a Spanish artist, Miguel Utrillo y Molins, signed a legal document acknowledging paternity, although the question remains as to whether he was in fact the child's father.

Valadon, who had become a model after a fall from a trapeze ended her chosen career as a circus acrobat, found that posing for Berthe Morisot, Pierre-Auguste Renoir, Henri de Toulouse-Lautrec, and others provided her with an opportunity to study their techniques. She taught herself to paint, and when Toulouse-Lautrec introduced her to Edgar Degas, he became her mentor. Eventually she became a peer of the artists she had posed for. In some cases, she had even become their mistress.