Megan McDonald, the writer behind the beloved children’s series of books based on the Judy Moody character, teams up with television screenwriter Kathy Waugh and director John Schultz to bring Judy (Jordana Beatty) to life in this genuinely goofy adaptation that dares to remain faithful to its third-grade-reader roots by not pandering with inappropriate pop-cultural references to lure in teens or adults. Grade: C-plus.