Popsugar Entertainment Halloween Downton Abbey Halloween Costume Ideas 15 Proper Downton Abbey Costumes You Can Wear This Halloween October 26, 2019 by Kelsie Gibson View On One Page Photo 14 of 15 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 14 Thomas Barrow What to wear: A butler's costume with a white bow tie. Previous Next Start Slideshow HalloweenDownton AbbeyHalloween CostumesHalloween Costumes 2019TVMovies