I just finished this biography of Sheila Chisholm (also known as Lady Loughborough, Lady Milbanke, and Princess Dimitri). She was one of the original "it" girls. She was from Australia, but through marriage became one of the most popular London socialites in the 1920's and 1930's.
I've always said I should have lived during this time period because I have been fascinated with it for my whole life. This was a nice glimpse into that era of glamour and happiness.