Entertainment Tonight ran a brief piece this evening from the set of Divergent in which we see Shailene Woodley filming scenes on a Chicago rooftop.

In the segment, Woodley and her co-star Zoe Kravitz (who plays Christina) talk about the storyline. The latter actress is confident in the film’s potential success. Theo James who plays Four is also briefly spotted. Watch below:

“Her decisions are constantly being torn between whether to be brave or whether to be selfless,” Woodley says to ET.

Divergent opens in theaters March 21 and is based on the book of the same name by Veronica Roth. This is one of the first official behind-the-scenes looks of the highly-anticipated film.

The cast and crew of Divergent, including Woodley and James, will appear at San Diego Comic-Con next week to share the first official clips from the movie. Filming is expected to wrap in Chicago over the next few days, so their event in San Diego next week is a wrap party of sorts.

Meanwhile, Roth will debut the third and final book in her Divergent trilogy, titled Allegiant, this October.