I imagine it is a wig considering she dropped out of My Sister's Keeper because she had to cut it.
my first thought. there's no way she's gonna cut it. at this point, i actually find it silly, but that's just me..
this haircut looks good on her, she looks older, but that's good cus she always looks like she's 14 (and just cannot convince me in her roles as time passes) and like she doesn't age, so i like that this is severe.
Dakota Fanning reveals a new cropped hairdo as she films scenes for "Now Is Good" in London (22nd July 2011). The actress plays a girl dying of Leukeamia who makes a list of things to do before she dies.
To me, this doesn't look like a wig at all. If it is, it's very good! Usually when they put wigs on actors in movies, they look terrible(Kristen Stewart in that Twilight film comes to mind).