Alexander's day begins with gum stuck in his hair, followed by more calamities. Though he finds little sympathy from his family and begins to wonder if bad things only happen to him, his mom, dad, brother, and sister all find themselves living through their own terrible, horrible, no good, very bad day.
| Writing | Matt Lopez | Screenplay |
| Writing | Judith Viorst | Book |
| Directing | Marvin Lemus | Director |
| Production | Shawn Levy | Producer |
| Production | Daniel S. Levine | Producer |
| Production | Lisa Henson | Producer |
| Production | Dan Cohen | Producer |
| Production | Emily Morris | Executive Producer |
| Crew | Al Goto | Stunt Coordinator |
| Directing | Al Goto | Second Unit Director |
| Crew | Ed Duran | Stunts |
