Did she ever live in England?
I just saw an interview with her and she had a distinct English accent with a slight American hint. As an English girl myself, living in the USA, I was shocked to see that she's American, not English.
From her accent it sounded like she's English and picks up an American twang from living in the USA, so I came to see how long she'd lived here since I still have my accent lol.
So where does the English come from in her accent, or is she a method actor adapting?