Wonder Man (Simon Williams) is a fictional character appearing in American comic books published by Marvel Comics.
It was created by writer Stan Lee and artists Don Heck and Jack Kirby. He first appeared in The Avengers #9 (October 1964).
The character, who was introduced as a supervillain with "ionic" energy, fought the Avengers. After a series of events, he was reborn as a superhero joining the team against which he originally fought.
Wonder Man made his debut in the Disney+ series of the same name set in the Marvel Cinematic Universe, and is played by actor Yahya Abdul-Mateen II.