It doesn't take much browsing through my portfolio or Flickr stream to see that my sister-in-law Elizabeth is a frequent collaborator. She's not a professional model and I don't have access to a hair or makeup artist, but she's worked well with me because she a) loves to have her picture taken, b) possesses an expressive face, and c) takes direction really well.
When she was visiting over the holidays she brought with her what was essentially her Halloween costume: a semi-formal get-up intended to look like Audrey Hepburn in Breakfast at Tiffany's. We had a bunch of fun with it, shooting at my favorite bar and with my studio lights at home. You can take a look at this set on Flickr as well.