With Marvel getting ready to start production on their first Phase Three movie Ant-Man, the studio has hired new writers Gabriel Ferrari and Andrew Barrer to polish the most recent script revision by Adam McKay.

Marvel brought on writer Adam McKay and director Peyton Reed exactly one month ago, following filmmaker Edgar Wright's surprising exit back in May. Gabriel Ferrari and Andrew Barrer were hired as "production writers," meaning they will be present on the Ant-Man set in Atlanta over the next few months doing revisions to the script. It's unclear if they will receive any screen credit for their work, which will be decided by the Writer's Guild of America's arbitration committee.

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The writers previously worked on the Sabrina the Teenage Witch reboot for Sony Pictures, and it is said that this draft is what impressed Marvel enough to give them the Ant-Man gig. They also made The Black List in 2010 for their script Die in a Gunfight.

It isn't known exactly when shooting will begin on Ant-Man, which stars Paul Rudd, Michael Douglas, Michael Pena, Evangeline Lilly, Patrick Wilson, Corey Stoll and last week's latest casting addition, David Dastmalchian.