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 2 of 27 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 2 Mary Drake What to wear: Like "A.D.," Mary Drake dresses all in black. Even her hair is really dark! How to act: Tortured and secretive. You've got a lot going on, but you're not willing to let anyone in. Previous Next Start Slideshow Pretty Little LiarsHalloweenHalloween CostumesPop Culture Halloween CostumesTV