Giovanni Maria "Gianni" Versace (Italian: [dʒoˈvanni maˈriːa ˈdʒanni verˈsaːtʃe]; 2 December 1946 – 15 July 1997) was an Italian fashion designer and businessman. He was the founder of Versace, an international luxury-fashion house that produces accessories, fragrances, make-up, home furnishings and clothes. He also designed costumes for theatre and films. As a friend of Eric Clapton, Princess Diana, Whitney Houston, Naomi Campbell, Kate Moss, Madonna, Elton John, Tupac Shakur, Joan Collins and many other celebrities, he was one of the first designers to link fashion to the music world. He and his partner Antonio D'Amico were regulars on the international party scene. The place where he was born and raised, Reggio di Calabria, greatly influenced his career.

On 15 July 1997, he was murdered outside his Miami Beach mansion, Casa Casuarina, by spree killer Andrew Cunanan.

Giovanni Maria Versace was born in the city of Reggio Calabria on 2 December 1946 and grew up with his elder brother Santo Versace and younger sister Donatella Versace, along with their father and dressmaker mother, Francesca. An older sister, Tina, died at age 12 because of an improperly treated tetanus infection.

Versace was strongly influenced by ancient Greek history, which dominates the historical landscape of his birthplace. He attended Liceo Classico Tommaso Campanella, where he studied Latin and ancient Greek, without completing the course. He was also influenced by Andy Warhol.

Versace began his apprenticeship at a young age at his mother's sewing business, which employed up to a dozen seamstresses. He became interested in architecture before moving to Milan at the age of 26 to work in fashion design.

In 1973, he became the designer of "Byblos", a successful Genny's youthful line and in 1977, he designed Complice, another, more experimental, line for Genny. A few years later, encouraged by his success, Versace presented his first signature collection for women at the Palazzo Della Permanente Art Museum of Milan. His first fashion show followed in September of the same year. His first boutique was opened in Milan's Via della Spiga in 1978.

After opening his Milan boutique in 1978, Versace quickly became a sensation on the international fashion scene. His designs employed vivid colours, bold prints and sexy cuts, which were a refreshing contrast to the prevailing taste for muted colours and simplicity. His aesthetic, which "combined luxurious classicism with overt sexuality", attracted much criticism in addition to praise. He is quoted as saying, "I don't believe in good taste", which was reflected in his "brazen defiance of the rules of fashion". A saying referencing Versace's rivalry with Giorgio Armani was: "Armani dresses the wife, Versace dresses the mistress."

Gianni Versace often drew inspiration from historical periods like Classicism, Byzantium, the 18th century and the 1920s and 1930s. His designs reimagined elements such as Ravenna's mosaics and Roman drapery, incorporating them into contemporary fashion.