Allison Williams plays the mother of McKenna Grace's character in Colleen Hoover's adaptation 'Regretting You.' (Jessica Miglio/Paramount Pictures)Passionate romance, crushing loss and deep family secrets: A new trailer just dropped for the film adaptation of Colleen Hoover's 2019 novel Regretting You, and it's looking like yet another weepy, life-affirming tale from the author that brought the world It Ends With Us.Regretting You centers on a tight-knit family.