David Fincher ’s 1995 mystery crime thriller Se7en is a dark and gripping film that has since become a genre-defining classic. Decades later, the film has been given new life through IMAX and 4K releases,

Well, what was in the box? In honor of its 30th anniversary, David Fincher is finally revealing what he put in the box at the end of Se7en.

In the 1995 thriller's harrowing finale, Brad Pitt 's Detective Mills realises that serial killer John Doe (Kevin Spacey) has delivered him his wife's (Gwyneth Paltrow) head in a box after Detective Somerset (Morgan Freeman) opens it.

"I may not be interested in Y and Z, but if I can use it for the sake of X - all tools, if they do what they say they're going to do, are good tools," the director says.