Leto, in one of his first roles after winning the best supporting actor Oscar for Dallas Buyers Club, becomes the first actor since The Dark Knight's late Heath Ledger to play the Joker on the big screen. Smith, in a rare shift into ensemble fare, plays hired assassin Deadshot, while Hardy is military expert Rick Flag.
Robbie has signed up to play Harley Quinn, another traditional enemy of Batman, while Delevingne will portray magical villain Enchantress. Jay Courtney, an Australian actor best known for his turns in Jack Reacher and Divergent, takes the role of dysfunctional villain Boomerang, traditionally an enemy of the Flash.
Suicide Squad was revealed as part of Warner's slate of 10 movies based around the DC Comics universe – an ambitious bid to take on Disney-owned Marvel Studio's own hugely successful series of interlinked superhero films – in October.