Holly Elizabeth Hills is the younger sister of Heather Hills who serves as a major love interest for Greg Heffley in the early books and the Diary of a Wimpy Kid film adaptations. Holly is the most popular girl in Greg Heffley's grade, but she is considered to be the 4th prettiest girl in their grade, however (the top three prettiest girls are mentioned to all have boyfriends). Holly and Greg possibly became a couple in the film adaptation of Dog Days. She lives on Pleasant Street.