Leonetto Cappiello (April 9, 1875 – February 2, 1942) was an Italian-French poster artist and caricaturist who left an indelible mark on the world of advertising and graphic design during the early 20th century. Born in Livorno, Italy, he would later become one of the most influential figures in the Art Nouveau and Art Deco movements.

Cappiello's early life was marked by a fascination with art and design. He studied at the Florence Academy of Fine Arts before relocating to Paris in 1898. In the vibrant artistic atmosphere of the French capital, Cappiello honed his skills as an illustrator and caricaturist, contributing to various publications and newspapers.

It was in Paris that Cappiello's career took a pivotal turn. In 1900, he created his first poster for the famous café-concert, Le Frou-Frou. This work was a remarkable departure from the prevailing poster art of the time, characterized by intricate, ornate designs. Cappiello, instead, embraced bold simplicity and striking visuals. He employed strong, eye-catching colors and often featured a single, dominant image to convey the essence of the product or event being advertised.

One of Cappiello's most iconic posters, created in 1906, was for the liqueur brand, Cachou Lajaunie. It featured a striking green devil emerging from a box of the product. This poster marked a significant shift in advertising aesthetics, as it focused on a memorable image rather than detailed textual information. This approach was highly successful in capturing the attention of passersby and consumers.

Cappiello's innovative style revolutionized advertising and poster design. He understood the power of simplifying the message and making it instantly recognizable, a concept that still resonates in modern advertising. His influence extended across various industries, from beverages and entertainment to fashion and transportation.

Throughout his career, Cappiello created more than 1,000 posters, many of which are now considered classics of the genre. Some of his other notable works include posters for brands like Pirelli, Campari, and Chocolat Klaus. His ability to capture the essence of a product or event in a single, memorable image made him one of the most sought-after commercial artists of his time.

Leonetto Cappiello's legacy endures not only through his iconic posters but also through the enduring principles of advertising design he championed. His work continues to inspire graphic designers and advertisers, emphasizing the importance of bold visuals and simplicity in conveying a message effectively. Cappiello's contributions to the world of art and advertising remain an integral part of its history, and his innovative approach continues to shape the field to this day. He passed away in Cannes, France, in 1942, leaving behind a rich and influential body of work.