The book received a largely positive reception, including several
starred reviews. Reviewers noted its well-written and diverse characters and relatable plot. A
Kirkus starred review wrote of the "supremely well-crafted perspectives" of the four narrators. In a more mixed review, Sarah Hannah Gomez writing for the
Horn Book Magazine stated, "while the ending may be a bit too tidy, the children’s inner lives are distinctive, and each rings true." The diversity presented by the characters and the low-key way this was handled was also praised in several reviews, including by Angie Bayne writing for the
Jefferson City News Tribune, "diversity is not treated as a plot point but just a point of fact." Several reviews commented on the appeal of the book to children. Michelle Shaw writing for
School Library Journal, praised its wide appeal, "Readers across the board will flock to this book that has something for nearly everyone" while a starred
Booklist review stated, "readers will be instantly engrossed."
Hello, Universe was announced as the 2018 Newbery Medal winner in February 2018. The selection committee noted that the book was "masterfully told through shifting points of view," adding that "this modern quest tale shimmers with humor and authentic emotion." Kelly called winning the Newbery among her proudest moments. ==Adaptation==