With Wiseman unavailable to direct, the filmmakers launched an extensive search before they decided on a team of Swedish directors, Mans Marlind and Bjorn Stein ("Storm"). Marlind and Stein have known each other since they were kids, and they've developed an unorthodox system in which each man directs on alternate days. When one is directing, the other serves as "best buddy" while also answering all the cast and crew's questions which aren't immediately pressing.
It sounds crazy, but apparently it works. "I don't know how I'm going to go back to having one director," says Beckinsale. "By trading off, they are able to stay incredibly excited to have their turn. They never get burned out. I'm married to a director, so I realize that it's such a miserably nonstop job. There are always 50 people asking you questions. With a partner to answer those questions, the one who's directing can stay focused on the actors and the shot at hand."