Wow... here's who should've played her!
Never in a million years this would have occurred to me - before seeing the poster for "The Birthday girl":
http://www.imdb.com/title/tt0188453/photogallery-ss-0
Nicole Kidman.
(I know - a totally unbelievable idea!)
With dark lenses and dark hair, of course - she would have been much better an approximation (physically) than the actress who played her.
(BTW, I am NOT Kidman's fan.
Nor do I "hate" her.)