Popsugar Entertainment Halloween Costumes 2019 Downton Abbey Halloween Costume Ideas Go Back to the '20s With These Downton Abbey Halloween Costume Ideas 10 October 2019 by Kelsie Gibson View On One Page Photo 15 of 15 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 15 Isobel Crawley What to wear: A long-sleeve beaded dress with a long necklace to match. Previous Next Start Slideshow Halloween Costumes 2019Downton AbbeyMoviesHalloween CostumesHalloweenTV