Michael Christopher Tracy (February 14, 1958 – September 3, 2023), known as Tracy 168, was an American graffiti artist. He pioneered the art form known as wildstyle. Tracy 168 came to be known as one of the most influential graffiti and street artists of all time, as variations of wildstyle writing spread around the world. He is acknowledged to have been a seminal figure in the development of street art. Books about 1970s graffiti feature his car-long paintings with their characteristic kinetic script embellished with flames, arrows as well as cartoon characters and the "Tracy face," a grinning shaggy-haired visage in wrap-around shades.