Jessica Knoll is the New York Times bestselling author of Luckiest Girl Alive, which has been optioned for film by Lionsgate with Reese Witherspoon set to produce. She has been a senior editor at Cosmopolitan and the articles editor at Self. She grew up in the suburbs of Philadelphia and graduated from The Shipley School in Bryn Mawr, Pennsylvania, and from Hobart and William Smith Colleges in Geneva, New York. She lives in Los Angeles with her husband and her bulldog, Beatrice. The Favorite Sister is her second novel.