Christian Dior was born in Granville, a seaside town on the coast of Normandy, France. He was the second of five children born to Maurice Dior, a wealthy fertilizer manufacturer, and his wife, formerly Madeleine Martin.

Dior's family had hoped he would become a diplomat, but Dior was artistic and wished to be involved in art. To make money, he sold his fashion sketches outside his house for about 10 cents each. In 1928, Dior left school and received money from his father to finance a small art gallery, where he and a friend sold art by the likes of Pablo Picasso. The gallery was closed three years later, following the deaths of Dior's mother and brother, as well as financial trouble during the Great Depression that resulted in his father losing control of the family business.

From 1937, Dior was employed by the fashion designer Robert Piguet, who gave him the opportunity to design for three Piguet collections. Dior would later say that 'Robert Piguet taught me the virtues of simplicity through which true elegance must come. Whilst at Piguet, Dior worked alongside Pierre Balmain, and was succeeded as house designer by Marc Bohan – who would, in 1960, become head of design for Christian Dior Paris. Dior left Piguet when he was called up for military service.

In 1942, when Dior left the army, he joined the fashion house of Lucien Lelong, where he and Balmain were the primary designers. For the duration of World War II, Dior, as an employee of Lelong – who labored to preserve the French fashion industry during wartime for economic and artistic reasons – in attempts to preserve the fashion industry during the war, Dior designed dresses for the wives of Nazi officers and French collaborators.

In 1946 Marcel Boussac, a successful entrepreneur known as the richest man in France, invited Dior to design for Philippe et Gaston, a Paris fashion house launched in 1925. Dior refused, wishing to make a fresh start under his own name rather than reviving an old brand. On 8 December 1946, with Boussac's backing, Dior founded his fashion house. The actual name of the line of his first collection, presented on 12 February 1947, was Corolle (literally the botanical term corolla or circlet of flower petals in English).

Dior's designs were more voluptuous than the boxy, fabric-conserving shapes of the recent World War II styles, influenced by the rations on fabric. He was a master at creating shapes and silhouettes; Dior is quoted as saying "I have designed flower women." His look employed fabrics lined predominantly with percale, boned, bustier-style bodices, hip padding, wasp-waisted corsets and petticoats that made his dresses flare out from the waist, giving his models a very curvaceous form.

According to en.wiki.org