Which actress do anda think would be most suited to play Snow's mother?

I actually telah diposkan something about this the other day, that I would like Emma Stone to play her because I think she has a similar look to Snow and Emma, and she would have no problem playing a tough but kind queen. I know Emma Stone is alot younger than the Snow's dad, but she is probably older than Regina was supposed to be when he married her, so I think it would work.