Margot Robbie has brought to life an array of wild and memorable characters over the years, with her role as Barbie being among the most highly anticipated. However, fans of Robbie have been asking a particularly challenging question: how would her Barbie character get on with her acclaimed chaotic antihero, Harley Quinn?Robbie stunned in a Barbie-inspired black evening gown while walking the pink carpet at the premiere of the long-awaited movie — held at the Shrine Auditorium and Expo Hall in Los Angeles on Sunday — and she spoke with ET's Will Marfuggi about the fan-favorite hypothetical: would Barbie and Harley be friends, enemies or best friends?«Kind of all of the above,» Robbie said with a laugh.