A lot of the casting info discussed so far still seems to be speculative or at least not confirmed. It's hard to keep track of what is what. Perhaps someone could start a list of confirmed casting as it becomes known and add to it as more are revealed.
Once the casting is confirmed, ShadowGram will be sending out an update. Until that time we might not learn who has actually signed.
Of course, the interesting, or should it be maddening thing is that a lot of the Internet reports treated the news as if Jackie Earle Haley, Bella Heathcote and Eva Green had indeed been signed even though the source articles in Variety and on deadline.com clearly said each was in talks. But then, so what else is new on the Internet because it's all too often a place where speculation and rumor is presented as fact - so it's nothing to turn talks into actual signings...