That's sort of irrelevant now isn't it? And anyway, Judi Dench can't sing a note, by her own admission, but has no problem being in musicals.
And as to who should play it, I say Ute Lemper.
Nothing precious, plain to see, don't make a fuss over me. Not loud, not soft, but somewhere inbetween. Say sorry, just let it be the word you mean.