The film had some heavy subject matter, which Kate said was less of a challenge because of their friendship. "We're really lucky to have each other, because we've known each other for such a long time; we were really excited about how far we could go emotionally. And knowing that we have a certain trust level, there are no boundaries; we could keep pushing it and pushing it, and that was a real luxury to have that."
The movie's 2008 release allowed them to "spend more time together," according to Kate. Leo added, "It's great to work with one of your best friends, it really is. I'll always be looking to work with her again."
Source: Typepad user IMarriedaFrenchman