Family dynamics take a messy turn when a woman learns she has a half sister at her mother's funeral. As her perfect life starts to unravel, she suspects her new sister is to blame for her Mom's death.
Unfortunately the movie A Deadly Grudge is not yet available on HBO Max.
| Production | Audrey Mesler | Co-Executive Producer |
| Production | Marianne C. Wunch | Executive Producer |
| Production | Valentina Bove | Co-Executive Producer |
| Sound | Tomàs Peire Serrate | Music |
| Production | Rick Benattar | Producer |
| Editing | James Kondelik | Editor |
| Camera | Dave Calhoun | Director of Photography |
| Art | Carson Smith | Production Design |
| Costume & Make-Up | Kristy Pruitt | Makeup Department Head |
| Sound | Grant Cornish | Dialogue Editor |
| Sound | Grant Cornish | Sound Re-Recording Mixer |
| Sound | Lon Cloud Keith | Sound Mixer |
| Directing | Shaina Cline | Script Supervisor |
| Directing | Nigel Thomas | Director |
| Writing | Jenny Paul | Writer |
| Writing | Kaila York | Writer |
| Production | Paul Ruddy | Casting |
| Production | Warren McCullough | Casting |
| Costume & Make-Up | Meg Grace | Costume Designer |
| Production | Paul Ruddy | Associate Producer |
| Production | Blake Elder | Executive Producer |
| Production | Brittany Yost | Executive Producer |
| Production | Hannah Pillemer | Executive Producer |
| Production | Fernando Szew | Executive Producer |
| Directing | Hannah Whitney | First Assistant Director |
| Production | Shelley D. Needham | Line Producer |
| Directing | Neiagha Thomas | Second Assistant Director |
| Production | Warren McCullough | Extras Casting |
| Camera | Lil-Cliffton Daniels | Best Boy Grip |
