I love this movie...
As for bringing Judy Davis in too early...
Have you seen "Meet Me in St. Louis"?
Judy, at the age of 22, looked like 32. True Davis looked older than 32, yet it worked, because Blanchard still had a very young look to her that would have nevr matched Garland's 22 age.
Davis is freakin' fantastic in everything - Impromptu, The Ref, etc.
"Do you know what pledge time is, Andrew"? said the PBS Executive.
"Yes", Lloyd Webber replied. "My 50th birthday special must be one program that gets done a lot."
"No", mused the man from PBS heedlessy. "Not so much. Our Stephen Sondheim Carnegie Hall concert. That's a big one."
Spoons, forks and knives seemed suddenly to suspend their motion in horror, all around the table.