Popsugar Entertainment Halloween 40 Best Sister Costume Ideas For Halloween 2023 40 Best Sister Costume Ideas For Halloween October 6, 2023 by Maggie Panos First Published: October 1, 2015 View On One Page Photo 35 of 41 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 35 Sister Halloween Costumes: Mary, Winifred, and Sarah Sanderson From "Hocus Pocus" What to wear: Those dresses have to be staples at Halloween store by now, right? How to act: Like you've been sleeping for a really long time and now you just want to have some fun. Also, is that the scent of children? Previous Next Start Slideshow HalloweenHalloween CostumesPop Culture Halloween CostumesTVMovies