Just posted on Michael Bay's site.
http://michaelbay.com/2013/02/21/tmnt-we-are-bringing-megan-fox-back-into-the-family/
IGN is saying it's April O'Neil.
edit:
TMNT: we are bringing Megan Fox back into the family!
Michael Bay
http://michaelbay.com/2013/02/21/tmnt-we-are-bringing-megan-fox-back-into-the-family/
IGN is saying it's April O'Neil.
edit:
Variety said she beat out Anna Kendrick and Elizabeth Olsen for it.
How?!?! Both are much better fits and far better actresses