Actress for Umbridge

[rzl46]

I'm new to this group.  I've searched, and I can't find that this has 
been discussed.  If it has, please take pity on a newbie and point 
her in the right direction.

I was wondering if anybody has given any thought to what actress 
might portray Deloris Umbridge.  I've given it a lot of thought and 
decided that I would more or less have to ignore the physical aspects 
of her character and depend on the makeup and computer people to fix 
that.  When I concentrated on who could portray her unique 
combination of apparent sickly sweetness and less obvious evil 
nature, the only person who came to mind was Julie Andrews.  

Thoughts?  Other suggestions?

MaggieB