Just A MATTER OF TIME
Just saw Soul Surfer, and found a big difference betwen the Anna in "Charlie and the Cocholate Factory" and this Anna. She's not just prettier and taller, but also has grown as a real actress.
And I think that with her "Way, Way Back" coming this way, she will grow even more, and maybe would get to the size of actresses like Dakota Fanning, Saoirse Ronan or Jennifer Lawrence.
Bend your ARMS to look like wings (this is it) -Funeral For A Friend