Blake Lively and ‘It Ends With Us’ author Colleen Hoover chat with ET’s Denny Directo at Colleen’s Book Bonanza event in Grapevine, Texas, ahead of the release of the film adaptation of Colleen’s beloved novel, which stars Blake. The actress sends a message to fans of the book about bringing Lily Bloom’s story to the big screen, saying she understands the responsibility of telling this story properly. Plus, Blake dishes on bestie Taylor Swift’s music making it into the movie’s trailer and teases her next on-screen adventure in the ‘A Simple Favor’ sequel. Colleen also shares an update on the ‘Verity’ movie. ‘It Ends With Us’ hits theaters on Aug. 9.