Popsugar Entertainment Halloween Once Upon a Time Costumes For Halloween 10 Fairy-Tale-Perfect Once Upon a Time Halloween Costume Ideas October 31, 2018 by Kelsie Gibson View On One Page Photo 9 of 11 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 9 Belle What to wear: A blue peasant dress with matching heels and a perfectly twisted updo. Don't forget to carry around your favorite book. How to act: Offer people a warm smile while you softly hum "Beauty and the Beast." Previous Next Start Slideshow HalloweenOnce Upon A TimeHalloween CostumesGroup Halloween CostumesPop Culture Halloween CostumesTVDisney Halloween Costumes