Truthfully? I think they'll pull it off. I re-read the play recently, and beauty that is, lends itself to a certain stylization of performance that reading provides. Their ages are poignant, the audience unavoidably will bring the film history in with them, and it could be charming, if not exactly the return of Dewhurst and Robards. It doesn't have to be at that level to work, which is why the play itself is such a gem. MacGraw might be surprisingly right. Oddly enough, with her background, it's a good fit. She's a very bright, highly educated woman, acting skills aside (she entered modeling with a degree from Wellesley, after all.)
"I'm a comedian, but in my spare time, things bother me." Garry Shandling