Arnett penned the script with Mark Chappell.
Cooper also is producing along with Arnett and Kris Thykier, who is through his Archery Pictures banner.
John Bishop will exec produce.
Bradley Cooper & Will ArnettGetty/Courtesy
Plot details are being kept under wraps.
The film already is predicted to be a major player this awards season.
3.He is repped by Range Media Partners.
He also voiced the title character of NetflixsBoJack Horseman.
His film credits includeThe Lego MovieandTeenage Mutant Ninja Turtlesfranchises,Blades of GloryandSemi-Pro.
Arnett and Chappell also worked onFlakedtogether.
Arnett is represented by CAA, Artists First, and Sloane Offer Weber & Dern.
