The producers intended that Kevin Spacey should receive top billing at the start of the movie but he insisted that his name not appear in the opening credits, so as to surprise the audience with the identity of the killer. To compensate, he is listed twice in the closing credits: once before the credits start rolling, and once in the rolling credits in order of appearance. Another advantage from Spacey’s point of view, as he saw it, was that he was excluded from the film’s marketing during its release, meaning he didn’t have to make any public appearances or do any interviews.

(originally posted by filmtrivia)