Conversation so far:
when was all about eve developed?
The story of All About Eve originated in an anecdote related to Mary Orr by actress Elisabeth Bergner.
what was the anecdote?
Bergner allowed a young fan, Martina Lawrence, to become part of her household and employed her as an assistant, but later regretted her generosity.
why did she regret the generosity?
the woman attempted to undermine her.
how did she try to undermind her?
CANNOTANSWER.

Question: who was a part of the development?
Self-contained rewrite: who was a part of the development in All About Eve?