What's classier than royalty? Celebrate everyone's favorite royal couple by dressing as Prince William and Kate Middleton.
His costume: A suit will do, but bonus points if you can recreate the Irish Guards uniform Wills donned for the royal wedding with thrift store finds.
Her costume: There's a smorgasbord of options here, from the famous Sarah Burton wedding gown to the pictured red suit. Almost anyone can find a smart-looking suit or dress, but it's not truly Kate without the matching purse, gloves and shiny brunette mane.
Spice it up: Carry around a baby doll for the full family effect.