Rob Kim / Dave Kotinsky, Getty Images
Variety reports
Not familiar with "Ant-Man"?
In the Marvel universe, the scientist has been known as both Ant-Man - shrinking himself - and Goliath - making himself gigantic.
While Gordon-Levitt and Rudd may be up for the role, neither is a sure bet for the film. Variety reports another unnamed actor may step into the role.
Originally, the film was set to debut in theaters after "Avengers: Age of Ultron." However, after Disney's next Pixar film was moved back, a shifting schedule caused "Ant-Man" to move up to a July 31, 2015 release date.
The "Avengers" sequel is due in theaters May 1, 2015.
Would you want to see JGL or Paul Rudd as Henry Pym?