Did they ever solidify her age? I know early on she was 38, but I believe they aged the character up a bit for Alice Ripley after the pre-Broadway version.
Best idea EVER!!! Toni Colette does singing roles just enough to make me always long for more of her (meaning she doesn't do singing roles nearly enough).
I can't recall if they ever explicitly state her age, but if she could have a son that is nearly 18, it kind of establishes her as being at least in her later 30s.
"...everyone finally shut up, and the audience could enjoy the beginning of the Anatevka Pogram in peace."
It used to be that she got pregnant in college at age 20, but removed the explicit reference to her age. which puts her at approximately 38-40ish. Realistically in practice, Dianas skew older in casting.