Update: May 12, 2016 Ben Affleck is a Genius Assassin in THE ACCOUNTANT Trailer Warner Bros. has released the first trailer for the action-thriller The Accountant. Warrior helmer Gavin O’Connor directs and Ben Affleck stars in the action-thriller about a mild-mannered accountant who moonlights as a lethal assassin. That logline is a tad misleading, however, as this trailer reveals that Affleck’s character is on the spectrum. Affleck pushed back his next directorial film Live By Night for a third time so he could take the starring role in The Accountant. Clearly he saw something in the project and/or Bill Dubuque‘s screenplay that made the film worthwhile. The film also stars Anna Kendrick, J.K. Simmons, Jon Bernthal, Jeffrey Tambor, and John Lithgow. The Accountant opens in theaters on October 14th. Ben Affleck is a Genius Assassin in the First Trailer for 'The Assassin'