 | Patton Oswalt als Max (voice) |
 | Kevin Hart als Snowball (voice) |
 | Eric Stonestreet als Duke (voice) |
 | Jenny Slate als Gidget (voice) |
 | Tiffany Haddish als Daisy (voice) |
 | Lake Bell als Chloe (voice) |
 | Nick Kroll als Sergei (voice) |
 | Dana Carvey als Pops (voice) |
 | Ellie Kemper als Katie (voice) |
 | Harrison Ford als Rooster (voice) |
 | Chris Renaud als Norman / Additional Voices (voice) |
 | Bobby Moynihan als Mel (voice) |
 | Hannibal Buress als Buddy (voice) |
 | Pete Holmes als Chuck (voice) |
 | Henry Lynch als Liam (voice) |
 | Tara Strong als Additional Voices (voice) |
 | Sean Giambrone als Cotton (voice) |
 | Meredith Salenger als Cat Lady (voice) |
 | Michael Beattie als Lead Wolfdog / Skinny Cat (voice) |
| Kiely Renaud als Molly (voice) |
 | Jessica DiCicco als Princess / Tiny (voice) |
 | Garth Jennings als Hamster (voice) |
 | David Acord als Additional Voices (voice) |
 | Jaime Camil als Additional Voices (voice) |
 | Antonio Raul Corbo als Additional Voices (voice) |
 | Brian T. Delaney als Additional Voices (voice) |
 | Terri Douglas als Additional Voices (voice) |
 | Sandra Echeverría als Additional Voices (voice) |
 | Kylie Hart als Additional Voices (voice) |
 | JP Karliak als Additional Voices (voice) |
 | John Kassir als Additional Voices (voice) |
 | Scott Menville als Additional Voices (voice) |
 | Scott Mosier als Additional voices (voice) |
 | Laraine Newman als Additional Voices (voice) |
 | Capri Oliver als Additional Voices (voice) |
 | Arthur Ortiz als Additional Voices (voice) |
 | Lucian Perez als Additional Voices (voice) |
| Maddix Robinson als Additional Voices (voice) |
 | Ashley Silverman als Additional Voices (voice) |
 | Fred Tatasciore als Additional Voices (voice) |
 | Cory Walls als Additional Voices (voice) |
 | Matthew Wood als Additional Voices (voice) |
| Chris Renaud | Director |
| Brian Lynch | Writer |
| Janet Healy | Producer |
| Brian Lynch | Screenplay |
| Alexandre Desplat | Original Music Composer |
| Jonathan del Val | Co-Director |
| Christelle Balcon | Co-Producer |
| Brett Hoffman | Executive Producer |
| Chris Meledandri | Producer |
| Robert Taylor | Associate Producer |
| Tiffany Hillkurtz | Editor |
| Colin Stimpson | Production Design |
| Matthieu Gosselin | Art Direction |
| Jeannine Berger | Post Production Supervisor |
| Guillaume Bugeas | Production Supervisor |
| Brice Colinet | Production Manager |
| Michael De La Cruz | Production Supervisor |
| Thomas Deveaux | Production Supervisor |
| Louise Dziadkowiak | Production Supervisor |
| Laure Gauthier | Production Supervisor |
| Eileen Godoy | Post Production Supervisor |
| Laëtitia Grandjean | Production Supervisor |
| George Hiro Herrmann | Production Supervisor |
| Kelly Lake | Production Supervisor |
| Steven Ligot | Production Supervisor |
| Elizabeth Malpelli | Production Supervisor |
| Joséphine Monthioux | Production Supervisor |
| Mathilde Naunto | Production Supervisor |
| Marie Parodi | Production Supervisor |
| Tifenn Philipott | Production Supervisor |
| Stella Ramsden | Production Supervisor |
| Natacha Ravlic | Head of Production |
| Laleh Sahrai | Production Manager |
| Marci Salk | Production Supervisor |
| Charles Seignolle | Production Supervisor |
| Alexandra Skinazi | Production Supervisor |
| Jessica Stone | Production Supervisor |
| Chanal Carole | Special Effects |
| Addison Teague | Sound Effects Editor |
