Ant-Man is a superhero film in which Paul Rudd plays the lead role of Scott Lang, a former thief who becomes the superhero Ant-Man. The movie follows Scott as he teams up with Dr. Hank Pym, played by Michael Douglas, to protect the Ant-Man suit and prevent it from falling into the wrong hands. With its blend of action, humor, and heart, Ant-Man showcases Paul Rudd's versatility as an actor. His charismatic performance brings a lightheartedness to the superhero genre, making the film an enjoyable watch for both Marvel fans and casual viewers.