Wes Wilson (born July 15, 1937) is an American artist and one of the leading designers of psychedelic posters. Most well known for designing posters for Bill Graham of the The Fillmore in San Francisco, he invented a style that is now synonymous with the peace movement, psychedelic era and the 1960s. In particular, he is known for inventing and popularizing a "psychedelic" font around 1966 that made the letters look like they were moving or melting. It was very common by the 1970s. Wilson was also one of the founders of the Berkeley Bonaparte poster company.