Marie Windsor as the Lady-in-Waiting spy
I had thought that Queen Anne's servant looked familiar. (The brunette with the big lips and big eyes that always looked like she was ready to hear and report everything she could observe.) At first I guessed Linda Darnell, but recognized the name when I looked it up. http://www.imdb.com/name/nm0934798/reference
She was a beauty that had a good career in supporting roles and walk-ons. Usually the sexy one on the 'dark side', like a bartending older woman with ties to organized crime, or the evil-but-beautiful archeologist in 'Abbott and Costello Meet the Mummy'.
Here is a particularly good poster of her in Hurricane Island http://www.imdb.com/media/rm3888750336/nm0934798