Last year, I was Professor Trelawney while my kids were Harry, Hermione, Luna and, Crookshanks. My husband wore a name tag which read, "Wendell Wilkins" (Potterheads who have read the book will get the reference). http://ourgoatrodeo.blogspot.com/2011/11/hogwarts-will-always-be-there-to.html

This year, my oldest is a weeping angel, my youngest the TARDIS, and they told me I need to be Sally Sparrow.