I expect that Keira brought a certain level of competence to the role because she is a good actress; I quite liked her in Bend It Like Beckham and Pirates of the Caribbean. But she's always seemed to be rather a sulty type to me, all sloe-eyes and sex appeal. Which is fine, but not, to me, what Lizzie needs. Somebody a little more effervescent would've been a better choice, I think.