The death was announced by artistic director of Givenchy, Clare Waight Keller. No other information was immediately available.
For more than four decades, Givenchy bridged the American and Parisian fashion worlds, designing effortlessly chic clothes that adorned European royalty and Hollywood stars. He clothed Greta Garbo, Marlene Dietrich, Grace Kelly, Lauren Bacall, Elizabeth Taylor and some of the world's most fashionable women, including first lady Jacqueline Kennedy and the socialites Rachel "Bunny" Mellon and Catherine "Deeda" Blair.
"Givenchy has long been a classicist, one of the last of the old school of haute couture, where gorgeous clothes were made for a woman to live in, not to decorate her," fashion journalist Dana Thomas wrote in The Washington Post in 1995. "His clothes moved with a woman's body, rather than restricted it."
The precociously talented, darkly handsome, 6-foot-6 designer was only 25 when he opened his own atelier in Paris in 1952. His debut collection was one of the earliest ready-to-wear, high-end fashion lines.
"Paris had been occupied by the Nazis and French fashion had been pretty much beaten in to the ground," said Valerie Steele, director and chief curator of the Fashion Institute of Technology Museum in New York. "He was one of the leading French courtiers in a period in which couture made a triumphant resurgence."
Givenchy thought mix-and-match separates, including interchangeable dresses, light skirts and chic tops, offered women more versatility with their look and choices in creating their own style. Operating on a shoestring budget, he created a handful of styles out of inexpensive men's shirting material for his first collection and asked customers to select their preferred fabric.
The crisp, embroidered, full-ruffled "Bettina" blouse (named in honor of the late model Bettina Graziani) was an instant hit. By the end of the first day of business, the store reportedly rang up 7 million francs (about $14,000 in today's dollars).
An account by the New York Times called Givenchy's collection "one of the most phenomenal debuts in the Paris couture."
Givenchy's fashioning of and relationship with Hepburn was often regarded as his broader cultural breakthrough. The couturier first met Hepburn in 1953 after she had been cast in writer-director Billy Wilder's romantic comedy "Sabrina." She played a Long Island chauffeur's tomboy daughter who studies abroad in Paris and returns a chic, sophisticated woman. Hepburn thought it would be fitting for her character to wear authentic Parisian couture.
When told he had the opportunity to costume Hepburn, Givenchy was under the impression it was a different famous Hepburn - Katharine Hepburn. Despite having received acclaim in the United States for her starring role in "Roman Holiday," which would eventually earn Audrey Hepburn an Oscar, the film had not yet been released overseas. At the time, the waifish actress was still a relatively unknown star in Europe.
Givenchy was shocked when the doe-eyed, gamine beauty walked into his studio. Scrambling to complete his next collection, he told Hepburn he was too busy to design original pieces for her but that she could select items from his previous season's collection, including the belted ivory dress she wore to the 1954 Academy Awards.
"She gave a life to the clothes - she had a way of installing herself in them that I have seen in no one else since, except maybe the model Dalma," Givenchy told Vanity Fair in 1995.
"Sabrina" went on to receive the Oscar for costume design, although head designer Edith Head failed to acknowledge Givenchy's contributions during her acceptance speech. According to Head's biographer, David Chierichetti, Head banked on the fact Givenchy was "such a gentleman he would not make a fuss." He didn't.
Hepburn was furious. From that point on, she insisted Givenchy costume her in subsequent films including "Funny Face" (1957), "Breakfast at Tiffany's" (1961) and "Charade" (1963). She became his greatest fashion ambassador on screen and off.
"His are the only clothes in which I am myself," said the actress, who died in 1993. "He is far more than a couturier, he is a creator of personality."
Although Givenchy did not invent the little black dress, he undoubtedly crafted one of the best remembered: the quintessential black satin gown worn by Hepburn in "Breakfast at Tiffany's." Hepburn's sleeveless sheath - with its striking bateau neckline, subtle, cinched waist and crescent-shaped cutouts in back - was an influential fashion statement.
Paired with elbow-length silk gloves, oversize glasses, a wide-brim hat and a necklet of pearls, the look gained worldwide renown.
"The little black dress is the hardest thing to realize," Givenchy once told the Independent newspaper, "because you must keep it simple." In 2006, the dress sold for more than $900,000 at a Christie's auction in London, one of the highest prices paid for a film costume.
When Hepburn was diagnosed with terminal colon cancer, he was the one who arranged her travel to Switzerland on a private plane owned by Bunny Mellon, the Listerine heiress who had married financier Paul Mellon. "Thank you for the magic carpet," the screen star later told her friend.
Hubert James Marcel Taffin de Givenchy was born in Beauvais, France, on Feb. 21, 1927, to a prosperous family of noble lineage. He was about 2 when his father died, and he was raised by his mother and maternal grandparents.
His grandfather was an artistic director of France's Gobelins and Beauvais tapestry manufactures. When Givenchy received good grades in school, his grandfather would reward him by allowing him the chance to peruse his vast collection of rare textiles. "I'd take piles of them and look at them and touch them for hours," he told People magazine. "I think that's where my vocation began."
In defiance of his family's wish that he pursue law, he attended the National School of Fine Arts in Paris. He later apprenticed under designers including Elsa Schiaparelli before opening his own workshop.
Givenchy also met and befriended Cristobal Balenciaga, a Spanish-born designer he had admired since childhood. Balenciaga mentored the younger couturier, even sharing his clients and seamstresses after he closed his fashion house in 1968.
"Balenciaga would dress the age-old haute couture mothers, while all of their daughters embraced Hubert," said Pamela Golbin, chief curator of the Museum of Fashion and Textiles in Paris. "He was a different energy and more modern, which appealed to a different generation."
After his retirement, Balenciaga encouraged many loyal clients to switch their allegiances to Givenchy, going as far as to walk Bunny Mellon over, hand-in-hand, across the street to his mentee's salon on Avenue George V.
Givenchy fashioned Mellon's entire wardrobe, from her lingerie to her gardening smocks, and she, in turn, helped design his gardens. The two shared weekly phone calls, Givenchy told the Financial Times, until her death in 2014 at 103.
Meanwhile, Givenchy's collections changed with the times, from feminine frocks in the 1950s to higher hemlines in the 1960s and tailored, debonair suits for men in the 1970s and 1980s. His whimsical romanticism and simple, elegant design aesthetic remained intact.
In 1988, Givenchy sold his design label to the French luxury goods conglomerate LVMH for $46 million. He continued to pour out collections six times a year until his official - somewhat forced - retirement in 1995. LVMH executives had dramatically downsized his responsibilities and voiced their desire to bring in new talent. His successor was the far-more radical British designer John Galliano.
The fashion house, which still bears Givenchy's name, has since been headed by Alexander McQueen, Julien Macdonald and, most recently, Italian designer Riccardo Tisci. "There is no continuity to any of the DNA of what Givenchy was doing," Steele said.
At Givenchy's final couture show in 1995, peers including designer Valentino, Yves Saint Laurent, Christian Lacroix and Oscar de la Renta paid their respects from the front row. Givenchy, dressed in his signature white smock, wept when Hepburn's son Sean Ferrer presented him with a bouquet of white roses taken from the 60 bushes he gifted Hepburn on her 60th birthday.
In his later years, Givenchy led the restoration of Louis XIV's vegetable gardens at Versailles, served as president of Christie's France, and collected fine art, furniture and sculptures. He received the Council of Fashion Designers award for lifetime achievement in 1996.
Information on survivors was not immediately available.
Once, when asked if his talent was God-given or self-made, Givenchy replied: "Maybe he give[s] you the energy and belief, but you must yourself have these things, too."
God, added the designer, "doesn't make the collections for you four times a year."
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