Jewishboy, love Marin Mazzie but I think she comes off as too sophisticated for Miss Hannigan. Of course she'd sell "Little Girls" and she has talent to spare so she could only surprise (Donna Murphy has a similar issue, though she successfully slummed it in LOVEMUSIK).
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"