Writer-director Gavin Wiesen says Roberts, 20, and Highmore, 19, were a perfect match for the movie. "Their chemistry was amazing," he says. "Emma is this mature, kind of grown-up little woman in a girl's body, and she's very sophisticated. And as smart as Freddie is, he feels a little bit more innocent."
"So, there was this great combination of innocence and experience on the one hand, but they're actually both whip smart."
Roberts, in particular, was a revelation, Wiesen says. "I didn't know if she was going to be a spoiled teenager, bratty Hollywood kid, and she was actually the hardest-working person out of the entire cast and crew," he says. "She definitely has an innate star quality, but I think what she also has is the smarts to use that star quality to further her career but also to better herself."