Re: The Official Scarlet Witch Thread
When it comes to casting Wanda, as I said above I think that Kunis would be a great choice. Rossum also has possibilities, as does Gemma Arterton. The three of them have shown that they can handle everything that the role will require, though there is no way of telling how much chemistry any one of them might have with the rest of the cast.
Though I've thrown out some suggestions I honestly trust the people at Marvel to find the perfect fit for each role, and I am certain that they are casting their net farther afield than any one of us can imagine at this point. There are probably dozens of age-appropriate actresses available for the casting director to choose from. The person selected is likely to be someone whom no fan had considered.
One thing I hope they will do is make sure that the actors who play Wanda & Pietro are very close in age. It would be jarring to have a noticeably older actor play one of the twins.