MaryHope Tobin asked about librarians in films.  As I recall, in " It's A
Wonderful Life", Jimmy Stewart's wife is a librarian/old maid when he sees
what the world be like if he had never lived.  Also, I don't know if this
counts, but Audrey Hepburn in "Funny Face" is a nerdy bookstore clerk
before fred Astaire "discovers" her.
Hope this helps.
Ilene Goldman
Northwestern University