This is a great interview with Brady from Adam Mulgrew at SeenSome.  Here’s the extract about Robert:

Robert Pattinson appears in the film as well in quite a crucial role. He’s done a lot of interesting films since the Twilight franchise came to an end and tends to generate interest from his fanbase in quite interesting, difficult films. Have you found that’s been the case with your film?

The film hasn’t been released in very many territories yet so it’s hard to say. But I know Rob and I were both very excited about this role and how surprising it would be in a way. Due to the size of it and the way that it’s used and ultimately what it communicates, it was important to have someone very recognizable in that role. It was kind of like a Janet Leigh in Psycho kind of thing, we needed to pull the rug out from everyone in a way. The role was created for a charismatic, handsome 30-year-old guy who was kind of the junior of the female lead and so for me, he was literally the first person my wife and I thought of. There was no-one that we could think of who would fit the bill who would be interested in a film like this but we knew Rob and knew his taste so we knew this would be something he would be interested in doing. We always try to offer roles to people who we think will like the material. I’ve never gone out of my way to offer Will Smith or Tom Cruise a role, ’cause it’s just not gonna happen.

Click on the link to read the full interview.