The actress seen in 'The Help' and 'How to Get Away with Murder' will play Amanda Waller in the upcoming DC Comics adaptation, Latino Review reports.
In the original comics, Amanda Waller is the government agent who gives orders to the Suicide Squad, a group of supervillains that includes The Joker, among others.
To be helmed by David Ayer ('Fury'), the feature will center on a group of characters accustomed to hatching evil schemes and battling Batman or Superman.
Convicted and imprisoned, the supervillains agree to undertake life-threatening missions for the US government in exchange for reduced sentences.
"It's a 'Dirty Dozen' with supervillains," Ayer told the British magazine Empire.
Viola Davis is on track to play Amanda Waller, but only if shooting can be worked around her TV schedule, which includes starring in 'How to Get Away with Murder'.
If an arrangement is reached, she will share the screen with Jared Leto, who is cast as The Joker, and Margot Robbie, who will play his henchwoman and girlfriend Harley Quinn.
DC Comics and Warner Bros have also enlisted Will Smith as the expert marksman Deadshot, Tom Hardy as the secret agent Rick Flag, Jai Courtney as Captain Boomerang and supermodel Cara Delevingne as the sorceress known as Enchantress.
'Suicide Squad' is due in theaters in August 2016, three months after the release of 'Batman v Superman: Dawn of Justice'.