If you're a fan of Gossip Girl and Pretty Little Liars, get ready to watch Lifetime's new series YOU. YOU stars Penn Badgley (Dan Humphrey on Gossip Girl) and Shay Mitchell (Emily Fields on Pretty Little Liars). A post shared by Shay Mitchell (@shaymitchell) on Jul 27, 2018 at 2:31pm PDT Here's what it's about: YOU is a 21st century love story that asks, “What would you do for love?” When a brilliant bookstore manager crosses paths with an aspiring writer, his answer becomes clear: anything…