It has not been announced yet. All we have are the fan favorites, the top choice being Rachel Leigh Cook. I'm sure it will be announced on Stephenie's website when Alice is cast.

thanx for the info :D

According to the Twilight Lexicon, which I think is a pretty reliable source, Alice has been cast. Ashley Greene will be playing the part.

thanx so much :D

In Twilight Movie Alice is a vampire...