Casting a movie is a tricky business: play it safe and choose somebody everybody is expecting and people will say: "What a boring choice - can't you think outside the box, Hollywood?" Cast somebody unexpected or unconventional, though, and people will say: "That's a terrible decision - why'd you pick Heath Ledger to play the Joker? Are you nuts?" Movie-goers love to talk about casting, of course, because a film often lives or dies on the strength and appropriateness of its actors. Countless films have been ruined because Hollywood made an ill-judged decision and chose the most ridiculous person imaginable (Hayden Christensen as Anakin Skywalker, anyone?), so it's not at all surprising that people are feverishly passionate when it comes to the matter of casting films they care about. That said, then, there are lots of movies currently in the cinematic pipeline that appear to have made something akin to an error when it comes to the casting department - 10 of the most questionable of which have been assembled for this list. In most cases, the actors hired to play these parts aren't bad (some are fantastic, even); it's just that they feel ill-suited to the characters they've been cast to play, for reasons of physicality, awkward Hollywood whitewashing and everything in-between...