Tell you one thing ,she is one hell of an actress!
All About Eve is a friends favorite movie,but its been aeons since I saw AAE..I've read the general idea is to make an actress look better as the film progresses.
Probably not beautiful in the Hollywood sense but as Graham Greene noted
As early as 1936, Graham Greene summarized Davis:
Even the most inconsiderable film ... seemed temporarily better than they were because of that precise, nervy voice, the pale ash-blond hair, the popping, neurotic eyes, a kind of corrupt and phosphorescent prettiness ... I would rather watch Miss Davis than any number of competent picture...1936