Watching The Runaways teaser trailer will get you arrested

Get your first look at the teaser trailer for The Runaways, the story of Joan Jett's proto Grrl-power band. Featuring a 15 year-old Dakota Fanning wearing stockings and a basque. Um... is this a trick?

I'm all for girl power. Why the other day, when I was being served by a waitress, I gave her a firm slap on the bottom so she knew I was impressed by her work. Don't look at me like that, feminists: they were great waffles.

This first trailer for Joan Jett biopic The Runaways, however, has me confused in all the scariest ways. Twilight's Kristen Stewart has slipped back into her trademark androgyny to play Jett complete with a fashionable Shoreditch haircut, but Dakota Fanning as singer Cherie Currie is bound to raise a few eyebrows (amongst other things, fnarr fn- no, I just can't do it - Ed).

I'm no prude, but casting a 15 year-old girl as a sexually-charged rock singer might be accurate (Currie wasn't yet 16 when she joined the group), but it's hella creepy. That's the beauty of casting agencies: if they can cast wrinkled thirtysomethings as teens in The OC then they can avoid contravening child labour laws in this one. I don't want to be the one guy in the queue to see The Runaways that's not sporting a Nic Cage paedo-tache.

Incidentally, a little Wiki-research tells me that Currie, now 50, later became an actress and has guest starred in Murder, She Wrote and Matlock. ROOOCKK AND ROLLLLL! (*kicks hole in bass drum, fellates microphone*)