P.S. If you have not yet checked out the awesome discussion on The Film Experience concerning dream casting August: Osage County, I highly suggest you do. Sissy Spacek, Judy Davis, and Grace Zabriskie get thrown into the mix for Violet, as well as Meryl (of course)...but for Mattie Fae!
This conversation was also had right here at the Silver Screening Room, and Nathaniel even gives a little shout-out (hee!).
Some ideas thrown out there are awesome, indeed. Kathleen Turner as Mattie Fae? Compare that to my choice of Julie Walters and you tell me what you'd rather see. I'm already regretting my not thinking of Mrs. Rabbit for that role.