And in the area of non-casting...

We've been hearing rumors that Cedric Diggory (no casting ever announced), Oliver Wood (Sean Biggerstaff) and Colin Creevey (Hugh Mitchell) will not be in PoA at all - not even in the background. We're checking into these rumors to see what we can confirm but at present, please consider them just that - rumors. It can also be noted that in the latest Sean Biggerstaff interview (here and here), he says he has not " as of yet" signed on for the third HP movie.