This is Harley Quinn:
She's the Joker's partner who just happens to be madly in love with him.
Anyway, I think Amy would be a great Harley! She was a dancer for a while, so I'm sure she'd be agile enough, she's proved more than once that she can play any character without missing a beat, and she has the perfect voice for her.
The only trouble is, I'm not entirely sure how she'd fit into Christopher Nolan's version of Batman (especially now that Heath's dead and he lost his perfect Joker
🙁). But I suppose he could find a way...after all, after seeing Batman Begins, you would never expect the Joker to fit in.
Oh, and does anyone remember the SMG-as-Harley rumors spreading around before The Dark Knight came out?