I know it’s a bit early, but I’m already trying to decide who I want to be for Halloween this year. Last year I was Snow White: 

I made the dress myself using velvet for the bodice, and satin for the skirt and sleeves. If anyone is planning on going as Snow White this year, these are available made to order in sizes 6-36 from my Etsy shop: https://www.etsy.com/uk/listing/208490201/princess-dress-cosplay