For what it’s worth, it’s perfect casting, but there’s still something surprising about the news that Dakota Fanning is taking on the starring role in Floria Sigismondi’s film about ’70s girl group The Runaways. As 15-year-old rocker Cherie Currie, Fanning will continue to bait stories about how quickly she’s growing up, though really the part seems both ironic and appropriate for the former child actress. Currie, who fronted the band wearing a lot of low-cut tops and lingerie on the outside (before Madonna!), may have grown up too fast thanks to her sexualized image and early abuses of drugs and alcohol, but just because Fanning will play the part doesn’t mean she’ll be similarly thrust into adulthood. If anything, her masquerade as Currie will be more effective if audiences recognize that Fanning is still a little girl.

Fanning remains on track to be her generation’s Jodie Foster (who, interestingly enough, costarred with Currie in the movie Foxes), rather than her generation’s Drew Barrymore. And at best this could be her Taxi Driver (at worst, it’s actually her Foxes). Unfortunately, Fanning is a young girl in the age of creepy Internet comments and count-down clocks (not to mention the truly terrible examples of pedophilia to be found on the web), so much of the response to her casting is going to be stuck in predictably thoughtless concerns for her fading innocence and joked anticipation of her innocence lost.

Here are some of the blogged expectations for how the role will impact Fanning’s age and image:

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