While production on Batman v Superman: Dawn of Justice has been under way for well over a month, it's never too late to add new cast members, with Scoot McNairy signing on. Deadline reports that no one at Warner Bros. will confirm the casting or reveal which character he is playing.

The actor joins a star-studded cast including Henry Cavill (Clark Kent/Superman), Ben Affleck (Bruce Wayne/Batman), Amy Adams (Lois Lane), Diane Lane (Martha Kent), Laurence Fishburne (Perry White), Gal Gadot (Diana Prince/Wonder Woman), Jesse Eisenberg (Lex Luthor), Jeremy Irons (Alfred Pennyworth) and Holly Hunter, Callan Mulvey, Ray Fisher and Tao Okamoto in unknown roles.

Zack Snyder is directing from a script by Chris Terrio and David S. Goyer, with Warner Bros. setting the highly-anticipated superhero adventure for release on May 6, 2016.

RELATED: Joaquin Phoenix's Joker Gets a Batman: The Animated Series Fan-Made Makeover

Who do you think Scoot McNairy may be playing in Batman v Superman: Dawn of Justice? The actor is coming off roles in Non-Stop and The Rover, and he also starred in the 2012 Best Picture winner Argo, which was directed by the new Batman, Ben Affleck. He will next be seen in Frank and Gone Girl later this year.