Margot Robbie to play Harley quinn

According to sources over at Collider, Margot Robbie has been cast or is in the final stages of negotiations with Warner Brothers to play the Joker's right hand lady in the much anticipated Suicide Squad, there has been much speculation in the casting of Suicide Squad of lately with reports earlier last week that Jared Leto is up for the role of the joker, along with Will Smith and Tom Hardy being up for unspecified roles also!!