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 25 of 27 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 25 The Liars From the Christmas Episode What to wear: White- and blue-toned gowns with varying degrees of lace, glitter, and sequins. How to act: Like you're ready to have fun but also suspicious that there's a murderer stalking you. Previous Next Start Slideshow Pretty Little LiarsHalloweenHalloween CostumesPop Culture Halloween CostumesTV