Peter is thrilled that his Grandpa is coming to live with his family. That is, until Grandpa moves into Peter's room, forcing him upstairs into the creepy attic. And though he loves his Grandpa, he wants his room back - so he has no choice but to declare war.
Unfortunately the movie The War with Grandpa is not yet available on HBO Max.
| Camera | Bill O'Drobinak | "A" Camera Operator |
| Camera | Ryan Weisen | First Assistant "B" Camera |
| Camera | Rodrigue Gomes | Second Assistant "A" Camera |
| Camera | Fred Thomas | First Assistant "A" Camera |
| Camera | Tim Fabrizio | Steadicam Operator |
| Camera | Ben Rothstein | Still Photographer |
| Camera | Tim Fabrizio | "B" Camera Operator |
| Camera | Scott Forte | Second Assistant "B" Camera |
| Production | Randall Emmett | Executive Producer |
| Directing | Tim Hill | Director |
| Crew | Camden Haydon | Stand In |
| Crew | Rick Avery | Stunt Double |
| Production | Sonny Schwartz | Executive Producer |
| Production | Matthew Salloway | Executive Producer |
| Production | Elizabeth Cree | Executive Producer |
| Production | Ted Fox | Executive Producer |
| Production | Myles Nestel | Executive Producer |
| Directing | Alan Steinman | Second Assistant Director |
| Production | George Furla | Executive Producer |
| Production | Wayne Marc Godfrey | Executive Producer |
| Production | Alan Steinman | Co-Producer |
| Sound | Christopher Lennertz | Music |
| Production | Christina Papagjika | Executive Producer |
| Production | Tom Prince | Co-Producer |
| Production | John Kennedy Fitzgerald | Co-Executive Producer |
| Production | Craig Chapman | Executive Producer |
| Production | Bryant Pike | Co-Executive Producer |
| Crew | Karin Justman | Stunt Double |
| Crew | Ted Barba | Stunt Double |
| Production | Berry Welsh | Executive Producer |
| Production | Jimmy Sommers | Executive Producer |
| Production | Joe Gelchion | Executive Producer |
| Production | Tre Peart | Executive Producer |
| Sound | Lauren Mikus | Music Supervisor |
| Production | David Lubotta | Executive Producer |
| Directing | Jeff J.J. Authors | First Assistant Director |
| Crew | Rudolf Weber | Stunt Coordinator |
| Production | Jane Rosenthal | Executive Producer |
| Production | Robert Jones | Executive Producer |
| Production | Michael C. Cuddy | Unit Production Manager |
| Crew | John Bernecker | Stunts |
| Production | Mandy Spencer-Phillips | Co-Producer |
| Crew | Eddie Fiola | Stunts |
| Crew | Cecilia Johnson | Stunts |
| Crew | Kevin Waterman | Stunts |
| Crew | Christopher Zmuda | Utility Stunts |
| Production | Veronica Alicino | Associate Producer |
| Crew | Loren Dennis | Stunts |
| Crew | Warren Raven Neal | Stunt Double |
| Production | Arnaud Lannic | Associate Producer |
| Crew | Jeremy Conner | Stunt Driver |
| Crew | Bayland Rippenkroeger | Stunts |
| Crew | Eric VanArsdale | Stunts |
| Production | Charlie Dombek | Associate Producer |
| Costume & Make-Up | Asia Baxter | Truck Costumer |
| Crew | Kent De Mond | Stunts |
| Crew | Justin T. Woods | Stunts |
| Crew | Emily Brobst | Stunt Double |
| Crew | Sarah Reagin Clemmensen | Stunts |
| Production | Samone Norsworthy | Associate Producer |
| Production | Francesca Dutton | Associate Producer |
| Crew | Jennifer Cocker | Stunt Double |
| Crew | Greg Dela Riva | Stunts |
| Production | Kamid Mosby | Associate Producer |
| Crew | Stephen Conroy | Stunts |
| Crew | Lori Lynn Weber | Stunts |
| Crew | Austin Seifert | Stunts |
| Crew | Tony Vo | Stunt Double |
| Crew | Mark Chavarria | Stunt Double |
| Crew | Jess Durham | Stunt Double |
| Crew | Steven Legate | Stunts |
| Crew | Miluette Nalin | Stunt Double |
| Crew | Gabrielle L. Stein | Stunts |
| Camera | Eddie Evans | Key Grip |
| Lighting | Jason Zaluska | Key Rigging Grip |
| Lighting | Jasen Danbury | Rigging Grip |
| Production | Paige Pemberton | Production Supervisor |
| Art | Justin O'Neal Miller | Art Direction |
| Costume & Make-Up | Christine Sonnenberg | Costume Supervisor |
| Costume & Make-Up | Ashleigh Chavis | Key Makeup Artist |
| Lighting | David Weissman | Electrician |
| Costume & Make-Up | Garnett Burk | Hair Department Head |
| Art | Lynne Mitchell | Set Decoration |
| Costume & Make-Up | Joseph Farulla | Makeup Department Head |
| Camera | Tom Barrett | Best Boy Grip |
| Camera | William Allen Evans | Grip |
| Directing | Jillian Amburgey | Script Supervisor |
| Costume & Make-Up | Tessa Kicklighter | Costumer |
| Lighting | Alex Mooradian | Electrician |
| Camera | James 'Tripp' Pair III | Dolly Grip |
| Camera | Daniel Parrott | Dolly Grip |
| Camera | Jennifer Braddock | Camera Loader |
| Costume & Make-Up | Robin Fredriksz | Makeup Artist |
| Lighting | Denny Mooradian | Gaffer |
| Lighting | Cory Poucher | Rigging Grip |
| Costume & Make-Up | Jerry Popolis | Hairstylist |
| Costume & Make-Up | Marco Santini | Hairstylist |
| Lighting | Cristen Clark | Electrician |
| Production | Alastair Burlingham | Associate Producer |
| Costume & Make-Up | Monica Ruiz-Ziegler | Costumer |
| Costume & Make-Up | Carla White | Makeup Artist |
| Camera | Patrick D. Fields | Grip |
| Production | David Hudaly | Associate Producer |
| Costume & Make-Up | Alan Downing | Costumer |
| Camera | Kevin Gentry | Grip |
| Costume & Make-Up | Synithia Cochran | Tailor |
| Lighting | Jeff Morris | Best Boy Electric |
| Lighting | Derek L. Harris Jr. | Rigging Gaffer |
| Camera | Thom Shepard | Grip |
| Costume & Make-Up | Mauricia Grant | Key Costumer |
| Costume & Make-Up | Dawn Turner | Key Hair Stylist |
| Lighting | Bailey Norman | Electrician |
| Sound | Jay Meagher | Sound Mixer |
| Sound | Brian Didsbury | Boom Operator |
| Art | Karen A. Felix | Property Master |
| Art | Adrianne Skrzypek | Assistant Property Master |
| Art | Meagen Lee | Graphic Designer |
| Production | Starr Gibbs | Assistant Location Manager |
| Production | Colin Rogers | Production Secretary |
| Production | Huxley Rodriguez | Assistant Production Coordinator |
| Directing | Gregory Santoro | Second Second Assistant Director |
| Art | Marlow Sanchez | Construction Coordinator |
| Production | Emily Kacere | Production Coordinator |
| Art | E. Aaron Linker | Set Designer |
| Art | Kemper Harris | Set Dresser |
| Crew | Veronica Alicino | Dialogue Coach |
| Production | Rebecca Carfagna | Casting Associate |
| Sound | Emma O'Reardon | Utility Sound |
| Production | Daniel Messler | Payroll Accountant |
| Art | Jordan Scott Heath | Set Dresser |
| Art | Tyler Betsill | Greensman |
| Art | Elizabeth Ralston | Props |
| Production | Joseph Raines | Assistant Location Manager |
| Production | David Richard Martin | Assistant Location Manager |
| Production | Danny Loeber | Location Coordinator |
| Art | Lauren Lebow | Art Department Coordinator |
| Art | Tommy Wilson | Leadman |
| Production | Johnny Radcliff | Extras Casting Assistant |
| Production | Kate Bowen | First Assistant Accountant |
| Directing | Aimee Pierson | Second Second Assistant Director |
| Production | Patrick Ingram | Extras Casting |
| Production | Dorit Yosha | Production Accountant |
| Production | Mark Fincannon | Casting |
| Production | Kathy M. Berry | Location Manager |
| Production | Matt DiGennaro | Assistant Accountant |
| Crew | Jeane Champion | Craft Service |
| Crew | Stan Swofford | Set Medic |
| Crew | Deborah Simmrin | Unit Publicist |
| Sound | Luke Gibleon | Sound Designer |
| Crew | Shane Greedy | Transportation Coordinator |
| Sound | Michael J. Benavente | Supervising Sound Editor |
| Editing | Leena Gundapaneni | Digital Intermediate Producer |
| Production | Margaret Gomollon | Post Production Accountant |
| Sound | Chris Hogan | Dialogue Editor |
| Editing | John Dietrick | First Assistant Editor |
| Editing | Zared Shai | First Assistant Editor |
| Sound | Rick Owens | Foley Artist |
| Sound | Xiao'ou Olivia Zhang | Dialogue Editor |
| Sound | Geordy Sincavage | Foley Mixer |
| Sound | Tara Blume | Foley Artist |
| Crew | Tonya Powell | Studio Teacher |
| Crew | Kevin Loding | Transportation Captain |
| Sound | Marc Fishman | Sound Re-Recording Mixer |
| Crew | Shannon Sylvester | Animal Wrangler |
| Sound | Mark Coffey | First Assistant Sound Editor |
| Editing | John Daro | Digital Intermediate Colorist |
| Crew | Greg SmithAldridge | Animal Wrangler |
| Sound | Michael S. Head | Foley Editor |
| Crew | John Portnoy | Post Production Supervisor |
| Production | Renee Minasian | Post Production Coordinator |
| Sound | Will Digby | Dialogue Editor |
| Editing | Elizabeth Lee | Assistant Editor |
| Production | Michaela Baral | Post Production Accountant |
| Visual Effects | Wes Dorough | Visual Effects Producer |
| Crew | Brock Shekelton | Visual Effects Editor |
| Sound | Christopher Lennertz | Original Music Composer |
| Visual Effects | Mark LeDoux | Visual Effects Supervisor |
| Sound | J.J. George | Music Editor |
| Sound | Gabriel J. Serrano | Sound Re-Recording Mixer |
| Production | Fabiana Arrastia | ADR Voice Casting |
| Production | Susan Boyajian | ADR Voice Casting |
| Sound | Christopher Lennertz | Conductor |
| Writing | Robert Kimmel Smith | Novel |
| Writing | Tom J. Astle | Screenplay |
| Production | Roe Baker | Casting Director |
| Costume & Make-Up | Christopher Hargadon | Costume Design |
| Production | Rosa Morris-Peart | Producer |
| Writing | Matt Ember | Screenplay |
| Production | Phillip Glasser | Producer |
| Production | Marvin Peart | Producer |
| Sound | Aaron Zigman | Original Music Composer |
| Editing | Peter S. Elliot | Editor |
| Art | John Collins | Production Design |
| Camera | Greg Gardiner | Director of Photography |
| Editing | Craig Herring | Editor |
| Production | Guy Fieri | Executive Producer |
