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 | Tim Fabrizio | "B" Camera Operator |
| Camera | Tim Fabrizio | Steadicam Operator |
| Camera | Scott Forte | Second Assistant "B" Camera |
| Camera | Rodrigue Gomes | Second Assistant "A" Camera |
| Camera | Bill O'Drobinak | "A" Camera Operator |
| Camera | Ben Rothstein | Still Photographer |
| Camera | Fred Thomas | First Assistant "A" Camera |
| Camera | Ryan Weisen | First 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 | Christina Papagjika | Executive Producer |
| Production | Elizabeth Cree | Executive Producer |
| Production | Jimmy Sommers | Executive Producer |
| Production | George Furla | Executive Producer |
| Production | Joe Gelchion | Executive Producer |
| Production | Ted Fox | Executive Producer |
| Production | David Lubotta | Executive Producer |
| Production | Myles Nestel | Executive Producer |
| Production | Craig Chapman | Executive Producer |
| Production | Wayne Marc Godfrey | Executive Producer |
| Production | Robert Jones | Executive Producer |
| Production | Jane Rosenthal | Executive Producer |
| Production | Berry Welsh | Executive Producer |
| Production | Tre Peart | Executive Producer |
| Production | Mandy Spencer-Phillips | Co-Producer |
| Production | Tom Prince | Co-Producer |
| Production | Alan Steinman | Co-Producer |
| Production | John Kennedy Fitzgerald | Co-Executive Producer |
| Production | Bryant Pike | Co-Executive Producer |
| Sound | Christopher Lennertz | Music |
| Sound | Lauren Mikus | Music Supervisor |
| Production | Michael C. Cuddy | Unit Production Manager |
| Directing | Jeff J.J. Authors | First Assistant Director |
| Directing | Alan Steinman | Second Assistant Director |
| Crew | Karin Justman | Stunt Double |
| Crew | Rudolf Weber | Stunt Coordinator |
| Crew | Ted Barba | Stunt Double |
| Crew | John Bernecker | Stunts |
| Crew | Emily Brobst | Stunt Double |
| Crew | Mark Chavarria | Stunt Double |
| Crew | Jennifer Cocker | Stunt Double |
| Crew | Jeremy Conner | Stunt Driver |
| Crew | Stephen Conroy | Stunts |
| Crew | Kent De Mond | Stunts |
| Crew | Greg Dela Riva | Stunts |
| Crew | Loren Dennis | Stunts |
| Crew | Jess Durham | Stunt Double |
| Crew | Eddie Fiola | Stunts |
| Crew | Cecilia Johnson | Stunts |
| Crew | Steven Legate | Stunts |
| Crew | Miluette Nalin | Stunt Double |
| Crew | Warren Raven Neal | Stunt Double |
| Crew | Sarah Reagin Clemmensen | Stunts |
| Crew | Bayland Rippenkroeger | Stunts |
| Crew | Austin Seifert | Stunts |
| Crew | Gabrielle L. Stein | Stunts |
| Crew | Eric VanArsdale | Stunts |
| Crew | Tony Vo | Stunt Double |
| Crew | Kevin Waterman | Stunts |
| Crew | Lori Lynn Weber | Stunts |
| Crew | Justin T. Woods | Stunts |
| Crew | Christopher Zmuda | Utility Stunts |
| Production | Veronica Alicino | Associate Producer |
| Production | Kamid Mosby | Associate Producer |
| Production | Samone Norsworthy | Associate Producer |
| Production | Francesca Dutton | Associate Producer |
| Production | Arnaud Lannic | Associate Producer |
| Production | David Hudaly | Associate Producer |
| Production | Alastair Burlingham | Associate Producer |
| Production | Charlie Dombek | Associate Producer |
| Production | Paige Pemberton | Production Supervisor |
| Art | Justin O'Neal Miller | Art Direction |
| Art | Lynne Mitchell | Set Decoration |
| Directing | Jillian Amburgey | Script Supervisor |
| Camera | Jennifer Braddock | Camera Loader |
| Costume & Make-Up | Christine Sonnenberg | Costume Supervisor |
| Costume & Make-Up | Mauricia Grant | Key Costumer |
| Costume & Make-Up | Asia Baxter | Truck Costumer |
| Costume & Make-Up | Alan Downing | Costumer |
| Costume & Make-Up | Monica Ruiz-Ziegler | Costumer |
| Costume & Make-Up | Tessa Kicklighter | Costumer |
| Costume & Make-Up | Synithia Cochran | Tailor |
| Costume & Make-Up | Joseph Farulla | Makeup Department Head |
| Costume & Make-Up | Ashleigh Chavis | Key Makeup Artist |
| Costume & Make-Up | Carla White | Makeup Artist |
| Costume & Make-Up | Robin Fredriksz | Makeup Artist |
| Costume & Make-Up | Garnett Burk | Hair Department Head |
| Costume & Make-Up | Dawn Turner | Key Hair Stylist |
| Costume & Make-Up | Jerry Popolis | Hairstylist |
| Costume & Make-Up | Marco Santini | Hairstylist |
| Lighting | Denny Mooradian | Gaffer |
| Lighting | Jeff Morris | Best Boy Electric |
| Lighting | Alex Mooradian | Electrician |
| Lighting | Bailey Norman | Electrician |
| Lighting | Cristen Clark | Electrician |
| Lighting | David Weissman | Electrician |
| Lighting | Derek L. Harris Jr. | Rigging Gaffer |
| Camera | Eddie Evans | Key Grip |
| Camera | Tom Barrett | Best Boy Grip |
| Camera | James 'Tripp' Pair III | Dolly Grip |
| Camera | Daniel Parrott | Dolly Grip |
| Camera | William Allen Evans | Grip |
| Camera | Patrick D. Fields | Grip |
| Camera | Kevin Gentry | Grip |
| Camera | Thom Shepard | Grip |
| Lighting | Jason Zaluska | Key Rigging Grip |
| Lighting | Jasen Danbury | Rigging Grip |
| Lighting | Cory Poucher | Rigging Grip |
| Sound | Jay Meagher | Sound Mixer |
| Sound | Brian Didsbury | Boom Operator |
| Sound | Emma O'Reardon | Utility Sound |
| Art | Karen A. Felix | Property Master |
| Art | Adrianne Skrzypek | Assistant Property Master |
| Art | Elizabeth Ralston | Props |
| Production | Kathy M. Berry | Location Manager |
| Production | David Richard Martin | Assistant Location Manager |
| Production | Starr Gibbs | Assistant Location Manager |
| Production | Joseph Raines | Assistant Location Manager |
| Production | Danny Loeber | Location Coordinator |
| Production | Emily Kacere | Production Coordinator |
| Production | Huxley Rodriguez | Assistant Production Coordinator |
| Production | Colin Rogers | Production Secretary |
| Production | Dorit Yosha | Production Accountant |
| Production | Kate Bowen | First Assistant Accountant |
| Production | Matt DiGennaro | Assistant Accountant |
| Production | Daniel Messler | Payroll Accountant |
| Art | E. Aaron Linker | Set Designer |
| Art | Lauren Lebow | Art Department Coordinator |
| Art | Meagen Lee | Graphic Designer |
| Directing | Aimee Pierson | Second Second Assistant Director |
| Directing | Gregory Santoro | Second Second Assistant Director |
| Crew | Veronica Alicino | Dialogue Coach |
| Art | Tommy Wilson | Leadman |
| Art | Kemper Harris | Set Dresser |
| Art | Jordan Scott Heath | Set Dresser |
| Art | Marlow Sanchez | Construction Coordinator |
| Art | Tyler Betsill | Greensman |
| Production | Rebecca Carfagna | Casting Associate |
| Production | Mark Fincannon | Casting |
| Production | Patrick Ingram | Extras Casting |
| Production | Johnny Radcliff | Extras Casting Assistant |
| Crew | Jeane Champion | Craft Service |
| Crew | Stan Swofford | Set Medic |
| Crew | Tonya Powell | Studio Teacher |
| Crew | Greg SmithAldridge | Animal Wrangler |
| Crew | Shannon Sylvester | Animal Wrangler |
| Crew | Deborah Simmrin | Unit Publicist |
| Crew | Shane Greedy | Transportation Coordinator |
| Crew | Kevin Loding | Transportation Captain |
| Crew | John Portnoy | Post Production Supervisor |
| Production | Renee Minasian | Post Production Coordinator |
| Editing | John Dietrick | First Assistant Editor |
| Editing | Zared Shai | First Assistant Editor |
| Editing | Elizabeth Lee | Assistant Editor |
| Production | Margaret Gomollon | Post Production Accountant |
| Production | Michaela Baral | Post Production Accountant |
| Editing | John Daro | Digital Intermediate Colorist |
| Editing | Leena Gundapaneni | Digital Intermediate Producer |
| Sound | Michael J. Benavente | Supervising Sound Editor |
| Sound | Luke Gibleon | Sound Designer |
| Sound | Will Digby | Dialogue Editor |
| Sound | Xiao'ou Olivia Zhang | Dialogue Editor |
| Sound | Chris Hogan | Dialogue Editor |
| Sound | Mark Coffey | First Assistant Sound Editor |
| Sound | Michael S. Head | Foley Editor |
| Sound | Rick Owens | Foley Artist |
| Sound | Tara Blume | Foley Artist |
| Sound | Geordy Sincavage | Foley Mixer |
| Sound | Marc Fishman | Sound Re-Recording Mixer |
| Sound | Gabriel J. Serrano | Sound Re-Recording Mixer |
| Production | Fabiana Arrastia | ADR Voice Casting |
| Production | Susan Boyajian | ADR Voice Casting |
| Visual Effects | Mark LeDoux | Visual Effects Supervisor |
| Visual Effects | Wes Dorough | Visual Effects Producer |
| Crew | Brock Shekelton | Visual Effects Editor |
| Sound | Christopher Lennertz | Original Music Composer |
| Sound | Christopher Lennertz | Conductor |
| Sound | J.J. George | Music Editor |
| Writing | Robert Kimmel Smith | Novel |
| Writing | Matt Ember | Screenplay |
| Writing | Tom J. Astle | Screenplay |
| Production | Roe Baker | Casting Director |
| Sound | Aaron Zigman | Original Music Composer |
| Costume & Make-Up | Christopher Hargadon | Costume Design |
| Editing | Craig Herring | Editor |
| Editing | Peter S. Elliot | Editor |
| Art | John Collins | Production Design |
| Camera | Greg Gardiner | Director of Photography |
| Production | Marvin Peart | Producer |
| Production | Rosa Morris-Peart | Producer |
| Production | Phillip Glasser | Producer |
| Production | Guy Fieri | Executive Producer |
