BEGIN SLIDESHOW New A Simple Favor Trailer starring Blake Lively and Anna Kendrick Lionsgate has released first official full-length trailer for the upcoming mystery thriller, A Simple Favor, which highlights the darker side of director Paul Feig (Spy, Ghostbusters, The Heat). Check out the official trailer for the film in the player below! A Simple Favor centers around Stephanie (Anna Kendrick), a mommy vlogger who seeks to uncover the truth behind her best friend Emily’s (Blake Lively) sudden disappearance from their small town.