I just realized how great she is

I have seen her in so many films and not even realized who it was and then all of a sudden just now I realized it. She's fantastic.
There are not many actors who wow me with performances and make me forget who I am watching. Not many who over several films do this so effectively that I don't even think of them as having been in previous films because I don't even recognize them. I am kind of stunned. She is a chameleon.