Development of Ant-Man began in April 2006, with the hiring of Wright to direct and co-write with Cornish. By April 2011, Wright and Cornish had completed three drafts of the script and Wright shot test footage for the film in July 2012. Pre-production began in October 2013 after being put on hold so that Wright could complete The World's End (2013). Casting began in December 2013, with the hiring of Rudd to play Lang. In May 2014, Wright left the project, citing creative differences, though he still received screenplay and story credits with Cornish, as well as an executive producer credit. The following month, Reed was brought in as Wright's replacement, while McKay was hired to contribute to the script with Rudd. Principal photography took place between August and December 2014 in San Francisco and Metro Atlanta.
The film stars Paul Rudd, Evangeline Lilly, Corey Stoll, Bobby Cannavale, Michael Peña, Tip "T.I." Harris, Anthony Mackie, Wood Harris, Judy Greer, David Dastmalchian, and Michael Douglas. Despite the cast giving great performances, in particular Rudd, Peña and Douglas, they lacked a few important elements that made their seem too familiar. For instance, Stoll's portrayal of Darren Cross suffers from what the other Marvel villains lack: depth. He's presents the character as a typical two-dimensional villain that are often associated with early comic-book movies. In addition the chemistry between Rudd and Lilly was weak and lacked the connection that Iron Man and Pepper Potts have.