Popsugar Entertainment Pretty Little Liars Pretty Little Liars Halloween Costume Ideas Have a Pretty Little Liars Halloween With These Costume Ideas October 17, 2017 by Ryan Roschke View On One Page Photo 15 of 27 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 15 The Black Widow What to wear: A black dress, black gloves, and a black lace veil. How to act: Much like the Black Swan, the Black Widow doesn't speak and hangs mysteriously in the background. Previous Next Start Slideshow Pretty Little LiarsHalloweenHalloween CostumesPop Culture Halloween CostumesTV