Popsugar Culture Harry Potter Best LeakyCon 2016 Harry Potter Cosplays Bow Down, Witches, These Were the Best Harry Potter Costumes at LeakyCon October 31, 2016 by Tara Block View On One Page Photo 23 of 35 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 23 Hermione at the Yule Ball Elizabeth Walker posed in her beautiful Yule gown. Previous Next Start Slideshow