Wait, who to the what now?

I just saw a commerical for The Other Boleyn Girl; in it Henry (played by Eric Bana, who's not red-haired but otherwise looks about right) meets Mary Boleyn for the first time and says, "Ah, so you're the other Boleyn girl."

*brain asplode*

I can't even get into how many things are wrong there, peoples. So many things! That one sentence makes The Tudors look like a documentary filmed in real time by comparison.

I haven't read the book; is the whole movie going to be like that? I need to be prepared!