 | Winslow Fegley als Timmy Failure |
 | Ophelia Lovibond als Patty Failure |
 | Wallace Shawn als Mr. Crocus |
 | Craig Robinson als Mr. Jenkins |
 | Kyle Bornheimer als Crispin |
 | Ai-chan Carrier als Corrina Corrina |
 | Chloe Coleman als Molly Moskins |
 | Kei als Rollo Tookus |
 | Caitlin Weierhauser als Flo |
 | Santiago Veizaga als Gunnar |
 | Ruby Matenko als Maxine Shellenberger |
 | Nicole Anthony als Mrs. Novachek |
 | Allie Dunbar als Vet Nurse |
 | Brenda Matthews als Store Owner |
 | Christopher Martinez als Gabe |
| Kate Churchill | Executive Producer |
| Michael Bederman | Executive Producer |
| Tom McCarthy | Director |
| Masanobu Takayanagi | Director of Photography |
| Jim Whitaker | Producer |
| Stephan Pastis | Novel |
| Tom McArdle | Editor |
| Carol Lavallee | Set Decoration |
| Jarrette Moats | Art Direction |
| Kendelle Elliott | Supervising Art Director |
| Stephan Pastis | Screenplay |
| Kari Perkins | Costume Design |
| Whit Vogel | Art Direction |
| Philip Messina | Production Design |
| Tom McCarthy | Screenplay |
| Brad Ricker | Supervising Art Director |
| Kerry Barden | Casting Director |
| Rolfe Kent | Original Music Composer |
| Tom McCarthy | Producer |
| Paul Schnee | Casting Director |
| Chris Ihlenfeldt | Production Assistant |
| David Andrews | Construction Manager |
| Brandie Sylfae | Stunts |
| Melissa R. Stubbs | Stunt Coordinator |
