Dakota Fanning has signed on to Girls Night Out.  The charming premise has Fanning playing the teenaged British Princess Margaret and going out on the town with her sister (and current Queen) Elizabeth on V.E. Day in 1945.  THR reports that Michael Hoffman (The Last Station) will direct after he finishes up work on the remake of Gambit starring Colin Firth and Cameron Diaz.  Trevor De Silva penned the script.I've become a fan of Fanning now that she's grown out of her precocious-child phase and into a mature actor.  Last October, Fanning was in talks to star in the drama If I Stay.  It's also assumed that she'll reprise her role as the evil vampire Jane in The Twilight Saga: Breaking Dawn.