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.
Stay tuned for possibly more on this.
Source: Deadpool