John Curtis Holmes (August 8, 1944 – March 13, 1988), better known as John C. Holmes or Johnny Wadd (after the lead character he portrayed in a series of related films), was one of the most prolific male pornographic film actors of all time; he appeared in about 2,500 adult loops and pornographic feature movies in the 1970s and 1980s. Holmes was best known for his exceptionally large penis, which was heavily promoted as the longest, thickest, and hardest in the porn industry, although no documented measurement of Holmes' actual penis length, girth, or tumescence has ever been confirmed.