But still remaining to be cast is the titular missing wife, which would be a juicy and high-profile role for a thirty-something actress. A project insider dismisses the possibility of Charlize Theron taking on the project, as had been reported. "Charlize is not doing this movie," emphasizes the source. A studio insider also rules out Natalie Portman -- who had been in the mix to star in Fincher's The Girl With the Dragon Tattoo before he cast Rooney Mara -- and Emily Blunt as potential candidates due to their availability. Reese Witherspoon, who optioned the book last summer via her Type A production company, is on board as a producer only and will not star.
"There's no shortage of women interested, [and it] will just come down to who Fincher wants," the studio source notes. Jack Reacher co-star Rosamund Pike, whose name has never been mentioned in conjunction with Gone Girl, is said to be the latest contender.
Also a question mark is the shape of the screenplay, which is considered to be a particularly tricky adaptation given that much of the first half of the book is told through diary entries. Flynn is adapting, though the author has not penned a screenplay before. But the project insider says at this point there is no need for an expensive 11th-hour rewrite. "Gillian is taking it all the way with David," the insider insists. "They've found a great rhythm together."