TV and Movies·Posted on 13 Jul 2018We Have Our First Look At Blake Lively And Anna Kendrick In "A Simple Favor" And It's Seriously MysteriousGone Girl is shaking.by Ellie BateBuzzFeed StaffFacebookPinterestTwitterMailLink If you're a fan of Anna Kendrick or Blake Lively or most likely both, you'll probably know they're starring in a movie together called A Simple Favor, directed by Paul Feig, the man behind Bridesmaids and Freaks and Geeks. Ethan Miller, Michael Loccisano / Getty Images Well, the first full trailer for the movie just dropped, and it looks seriously cool and kind of creepy. View this video on YouTube youtube.com In the trailer, we see Anna's character Stephanie and Blake's character Emily meet at their sons' school and start a friendship. Lionsgate / youtube.com But there's something more than a little ~off~ about Emily. Lionsgate / youtube.com Even though she dresses great. After Stephanie receives a mysterious phone call from her friend, Emily suddenly disappears, and Stephanie makes it her mission to find out what happened. Lionsgate / youtube.com But then Linda Cardellini appears to tell Stephanie to back off, because there's something shady about Emily. Lionsgate / youtube.com And THEN we see a quick shot of Linda's character painting a portrait of Emily in thigh-high boots??? MYSTERY. Lionsgate / youtube.com Meanwhile, Emily is sending messages to Stephanie via her children. Lionsgate / youtube.com The trailer ends with several shots in quick succession – like Stephanie getting cosy with Emily's husband, a body bag being lifted out of a lake, and Emily's husband getting arrested. Lionsgate / youtube.com Gone Girl is shaking and I need to know more immediately! Lionsgate / youtube.com But we'll have to wait til 21 September to find out exactly what happened to Emily.