
I think this dress would do the trick. Marchesa Fall 2011, from here and here. Maybe Kate would lend me her fab tiara. If not, it looks like I can get one at Sears!
For cool Halloween decor and tables, check out this Sweet Paul shoot (pgs 116-123).

Love the way Kate wore her summer whites. So crisp but feminine and princess-like without being dowdy. Dress is Reiss (again, yay!).