A-ONE, born in 1964, first started painting at the age of six, and began tagging subway cars in the mid-1970s. Although he studied architecture, he continued to refine his style throughout his career both on the street and through his work on canvas. A-ONE was a member of the Tag Master Killers, a group of artists which included RAMMELLZEE, TOXIC, DELTA 2 and KOOL KOOR. He was included in a number of group exhibitions in the United States throughout the 1980s and 1990s, and participated in the 1984 Venice Biennale. His work has also been the subject of numerous solo exhibitions at Galleria Salvatore + Caroline Ala in Milan, Italy; the Piccolo Museum in Lecce, Italy; and Galerie Quintessens, in Utrecht, the Netherlands. A-ONE died in Paris from complications from a brain hemorrhage at the age of 37.
A-one was a friend and collaborator of artist Jean-Michel Basquiat. Basquiat became his mentor and taught him how get involved with art galleries. A-ONE is the subject of Basquiat's paintings Portrait of A-One A.K.A. King (1982), which sold for $11.5 million in 2020, and Anthony Clark (1985).