In a world where families are limited to one child due to overpopulation, a set of identical septuplets must avoid being put to a long sleep by the government and dangerous infighting while investigating the disappearance of one of their own.
Unfortunately the movie What Happened to Monday is not yet available on HBO Max.
| Visual Effects | Christian J Smith | Visual Effects |
| Sound | Karen Baker Landers | Supervising Sound Editor |
| Sound | D. Chris Smith | Sound Designer |
| Sound | Peter Staubli | Sound Designer |
| Sound | Todd Toon | Sound Editor |
| Sound | Balázs Varga | Production Sound Mixer |
| Visual Effects | Lucian Iordache | Special Effects Supervisor |
| Visual Effects | Huseyin Caner | Visual Effects Supervisor |
| Visual Effects | Michel Denis | Visual Effects Supervisor |
| Visual Effects | Dominique Fiore | Visual Effects Supervisor |
| Visual Effects | Ronald Grauer | Visual Effects Supervisor |
| Visual Effects | Bryan Jones | Visual Effects Supervisor |
| Visual Effects | Aurelie Lajoux | Visual Effects Supervisor |
| Visual Effects | Chevin Shafaghi | Visual Effects Supervisor |
| Editing | Peter Bernaers | Colorist |
| Crew | David Fleming | Additional Music |
| Directing | Tommy Wirkola | Director |
| Writing | Max Botkin | Writer |
| Camera | José David Montero | Director of Photography |
| Editing | Martin Stoltz | Editor |
| Directing | Monica Tatu | Script Supervisor |
| Crew | Gaute Storaas | Additional Music |
| Sound | Nicolae Comarzan | Boom Operator |
| Sound | Serbanescu Iulian | Boom Operator |
| Sound | Andy Koyama | Sound Re-Recording Mixer |
| Sound | Alyson Dee Moore | Foley Artist |
| Sound | Christopher Moriana | Foley Artist |
| Sound | Chris Navarro | ADR Mixer |
| Sound | Patricia Nedd | Foley Artist |
| Sound | Michelle Pazer | ADR Editor |
| Sound | Kyle Rochlin | Foley Mixer |
| Sound | Mike Tehrani | ADR Recordist |
| Sound | Dean A. Zupancic | Sound Re-Recording Mixer |
| Production | Max Botkin | Co-Producer |
| Production | Giles Daoust | Executive Producer |
| Production | Raffaella De Laurentiis | Producer |
| Production | Thierry Desmichelle | Executive Producer |
| Production | Catherine Dumonceaux | Executive Producer |
| Production | Matthew Feitshans | Associate Producer |
| Production | Fabrice Gianfermi | Producer |
| Production | Hester Hargett | Line Producer |
| Production | Adrian Politowski | Co-Producer |
| Production | Philippe Rousselet | Producer |
| Production | Guy Stodel | Executive Producer |
| Production | Kerry Williamson | Co-Producer |
| Production | Laura Grosu | Casting |
| Production | Gillian Hawser | Casting |
| Art | Joseph Hodges | Production Design |
| Art | Iulian Bostănaru | Art Direction |
| Art | Eduard Daniel Vraciu | Art Direction |
| Art | Grigore Purcariu | Art Direction |
| Art | Dan Toader | Art Direction |
| Costume & Make-Up | Oana Păunescu | Costume Design |
| Sound | Christian Wibe | Original Music Composer |
| Writing | Kerry Williamson | Writer |
