Antonio Lopez was the king of the fashion illustrators. He burst onto the scene in the 1960s in New York, and with his vividly colored drawings, helped to introduce the joie de vivre of youth culture into the major fashion magazines. His work was marked by its exuberance: Flip through a copy of Antonio Lopez: Fashion, Art, Sex, and Disco, the monograph published last year by Rizzoli, and you will find that Lopez’s illustrations still boast magical power to leap off the page. This month, in London, the gallery East of Mayfair will be exhibiting a range of never-before-seen Lopez work¾a show Mr. Valentino would certainly recommend as a must-see, given that he was both a friend of Antonio Lopez, and a firm fan. Lopez created many illustrations for Valentino over the years, and their relationship dates back at least as far as 1971. That year, a Lopez portrait of Mr. Valentino graced an advertisement for the New York City boutique Martha’s. “This brilliant Italian brings you breathtaking fashion ideas in his new collection,” the copy reads. Indeed.