Though he hasn't been massively prolific in the last few years, James McAvoy is as much in demand as ever, and is having a pretty great 2013 already thanks to "Welcome To The Punch," "Trance" and his stage version of "Macbeth." He's got the right mix of star power and acting chops for the part, at 33 he's the right age, and again, he has a somewhat innocent facade, but can go darker when required. A very solid choice, even if he's likely to be lower down on the list than someone like Cooper.
Since hanging up his Spidey outfit, Tobey Maguire has been fairly quiet. He turned down "Rise of the Planet of the Apes," was cut from "Life of Pi," and basically no one saw either "Brothers" or "The Details," the films he's made since. But his name retains some marquee value, and with a high-profile part in "The Great Gatsby" on the way, he could be interesting here, particularly as he's always proved surprising in his darker roles ("Brothers," "The Good German"). But he is on the older side of things, and also isn't quite as obvious a fit for the good-looking, coasting-on-charm Nick as some of the other choices.
Having gotten new critical respect and box-office power thanks to his run of success last year, Channing Tatum is as in-demand as anyone else in Hollywood, and is firmly on Fincher's radar now as well. The actor is one of the filmmaker's possible choices for his version of "20,000 Leagues Under The Sea," should it get made. Tatum's going to be tied up on The Wachowskis' "Jupiter Ascending" for a while, and some might balk at the idea of him playing a journalist, but he was convincing as a white-collar type in "Side Effects," and would play the more feckless side of the character nicely. It'd be his biggest challenge yet, but he's proving increasingly impressive, and you know the studio -- and seemingly Fincher -- would be keen to have him.
Perhaps this name would raise the most eyebrows, but we know from his role in "The Social Network" that David Fincher has faith in Justin Timberlake, and that paid off with a strong performance in the Facebook flick. With "Inside Llewyn Davis" and "Runner Runner" on the way, he's only more likely to win over the doubters as time goes on, and he's the right age and type for the part, right down to the Southern background. It's still likely to cause some fan upset, but perhaps more importantly, he's got touring commitments in support of his new record through the summer. But if Fincher wants to wait for him, he could be a solid choice.
Honorable Mentions: A-listers likely to be on the studio wishlist (if not necessarily Fincher's) include Michael Fassbender, Tom Hardy, Chris Pine, Jeremy Renner, Henry Cavill and Ryan Reynolds. A notch or two below them, but on the up enough that they might be considered, there's people like Armie Hammer, Aaron Paul, Joel Kinnaman, Tom Hiddleston, Charlie Hunnam and Jason Clarke (though the latter, along with Peter Sarsgaard and Matt Damon, might be a touch too old at this point). Chris Evans, James Marsden and Scoot McNairy would be interesting choices as well.
Nick's wife alternates the narration. Every other chapter, at least at first, comes from Amy's diary, filling in the story of how the two met, married, and ran into marital difficulties. A little older than her husband at 38, she writes quizzes for magazines, but is actually incredibly wealthy, due to her parents writing Amazing Amy, a hugely successful series of children's books. But a few years into their marriage, Nick has managed to whittle down their trust fund, and their relationship certainly isn't what it was. She appears to be sweet, smart and generally adorable, but (without getting too spoiler-y) there's a darker side too.
The four-time Oscar nominee has already showed some interest in another Gillian Flynn-penned project; Adams was attached for a while to the writer's earlier novel "Dark Places," before Charlize Theron stepped in instead. But she'd be just as good a fit here. She's the exact same age as the Amy of the novel, and can pull off both the America's sweetheart side of the character and, as "The Master' proved, the more manipulative side of things too. "Man Of Steel" will only help her profile, so if her schedule allows it, this seems like a very smart pick.
At 29, Blunt is almost a decade younger than the Amy of the novel. But aside from that, we can't see much else wrong with the idea of casting the "Looper" and 'Five-Year Engagement" star -- and it would hardly be the first time a part's been aged down for an actress in cinema history. Often impressive, Blunt's profile continues to creep upwards (she's got Tom Cruise vehicle "All You Need Is Kill" coming up next year), and would be a smart fit for the old-money feel of Amy. She's perhaps not as Americana as some of the potential actresses, but maybe that would end up working to her benefit?