Here's an unconfirmed bit from 'DeadPool''s Blog on X-Men 3 casting:Maggie Grace (Lost) is out as Kitty Pryde. The production team has just issued a casting notice for the role. Ratner and Co. are a smart bunch because they're using the script to The Astonishing X-Men comic-book as sides. Wanna know the irony? The comic-book is written by Joss Whedon, who every fanboy dreamed of having writing and directing X-Men 3.
This is from X-Men Hype...I kind of glad that they are not using Maggie Grace, I don't think she was the right choice for the role.