High Quality Content by WIKIPEDIA articles! Mary Jane Watson, often shortened to MJ, is a fictional supporting character appearing, originally, in Marvel comic books and, later, in multiple spin-offs and dramatizations of the Spider-Man titles as the best friend, love interest, and one-time wife (as Mary Jane Watson-Parker) of Peter Parker, the alter ego of Spider-Man. Created by writer Stan Lee and artist John Romita, Sr., after a few partial appearances and references, her first full appearance was in The Amazing Spider-Man #42 (November 1966).