I have tickets for Hello Dolly on Tuesday 11th April. This is a preview performance so I assumed Bette Miller would be doing all of these shows? But now a friend tells me he doesn't think Midler is doing Tuesday evenings, but either Donna Murphy or another understudy is doing them instead. There was no mention of this on Telecharge when I purchased the tickets, I don't think. So is Bette likely to be off when I go?