The movie's opening moments, which are exceptionally subdued and tempered compared to the more dramatic second half, allow us to see how Margot Robbie can light up the screen even with little dialogue and very little known about her character at this point in the film. It takes a captivating and very talented actress to keep the audience's attention and interest like that during the early stages of the movie, and it's ultimately made clear by Z For Zachariah that Margot Robbie has the dramatic talent to pull off such a difficult feat. Thankfully, the Australian actress is obviously capable of holding her own when the tone changes part way through, and the movie adopts a much more dramatic and intense feel, which she also excels with.