Hank Pym

Cosplayer of the character.

Ant-Man (real name Dr. Henry Jonathan "Hank" Pym) is a fictional character and superhero from the Marvel Comics universe, appearing as one of the main protagonists of the Avengers comics, and the main protagonist when he appeared in the Tales of Astonish and his titular comics.

He is a scientist who discovered the Pym Particles, a rare group of subatomic particles that he was cable to entrap and used to shrink or grow. During his early tenure, he would meet Janet van Dyne, his partner and later wife, who became "The Wasp" and could also grow big or shrink small. Pym's also a founding member of the Avengers, and has been a member of the Defenders, Secret Defenders, West Coast Avengers, Mighty Avengers, Illuminati, and Knights of the Atomic Round Table.

Since the character's appearance in the comics, Hank Pym has appeared in numerous media over the years, such as in the Marvel Cinematic Universe, where he is portrayed by Michael Douglas.

He was created by the late Stan Lee, the late Jack Kirby, and Larry Lieber, and first appeared in Tales to Astonish #27 in January of 1962.