I'm going as a boy this time, because I had my hair cut a pixie cut. And I spent all morning trying to style it like Matt Smith's. (I HOPE IT WORKS FOR NEXT YEAR.)
So far me and my sister are thinking of/meeting:
Karen Gillan (Definatly)
Alex Kingston (Definatly)
John Leeson (Not sure)
Natalia Tena (Maybe)
Sylvester McCoy (maybe)