Julie Andrews isn't a diva?? EXCUSE ME?
Let's talk about what a diva this woman is... when I was doing Camelot a story about the grande Lady of the Theatre was relayed to me... during *her* time spent doing that musical on Broadway. It seems she was QUIT the diva, and not in the "good way". She actually threw a hissy fit and stomped on the director's foot at one point. If that's not a "diva" thing to do, I'm not sure what is.
Please don't get me wrong, I love the woman. I'm all for an actress with... um... spunk?
I'm not sure that Millie is the appropriate material to audition for Side Show with. I just think it might be a little "over the top" and doesn't really have... enough heart? Side Show's a lot darker than Millie, but that's just my opinion. PLUS, Millie is so overdone. I'd do something more original.

I mean, ultimately it's your audition, your choice. That's just my two cents.
"You! You are the worst thing to happen to musical theatre since Andrew Lloyd Webber! And you, well, I just plain don't like you."
~Stewart Gilligan Griffin