You all are going to laugh at my weirdo idea, but a few years ago, I was watching the movie version of Grease, and I wondered if any of those guys can fit into a Follies movie. I came up with:
Phyllis: Stockard Channing
Sally: Olivia Newton-John
Buddy: John Travolta
Ben: stuck on this one, I guess that's as far as I can go with the Grease thing.
If they were casting Carlotta a little older, I would have wanted Liza Minnelli (well, her from a few years ago). She tends to slur out her "S" in a funny way, where I can totally imagine her saying "I'm schtilll heeeerrrreeee!"
Xanadu! Can't cry on cue!