During the course of an ordinary week in Hollywood, movie producer Ben must navigate his way through shark-infested waters as he struggles to complete his latest projects. A demanding studio boss demands extensive changes to a movie starring Sean Penn, while another chief won't greenlight a project unless star Bruce Willis shaves his beard. Meanwhile, Ben tries to reconcile with his wife and maintain a relationship with his young daughter.
Unfortunately the movie What Just Happened is not yet available on HBO Max.
| Directing | Barry Levinson | Director |
| Writing | Art Linson | Author |
| Costume & Make-Up | Bill Corso | Makeup Department Head |
| Writing | Art Linson | Writer |
| Camera | Stéphane Fontaine | Director of Photography |
| Production | Robert De Niro | Producer |
| Production | Barry Levinson | Producer |
| Production | Art Linson | Producer |
| Production | Jane Rosenthal | Producer |
| Production | Mark Allan | Producer |
| Editing | Hank Corwin | Editor |
| Art | Stefania Cella | Production Design |
| Art | Anthony D. Parrillo | Art Direction |
| Sound | Tom Fleischman | Sound Re-Recording Mixer |
| Sound | Eugene Gearty | Sound Designer |
| Sound | Philip Stockton | Supervising Sound Editor |
| Costume & Make-Up | David Davenport | Costumer |
| Sound | Marcelo Zarvos | Original Music Composer |
| Art | David Gere | Set Decoration |
| Crew | David Gere | Stunts |
| Production | Victoria Cordova | Consulting Producer |
| Production | Mark Cuban | Executive Producer |
| Production | Eric Kopeloff | Executive Producer |
| Production | Todd Wagner | Executive Producer |
| Production | Mark Allan | Line Producer |
| Costume & Make-Up | Ann Roth | Costume Design |
| Costume & Make-Up | Mishell Chandler | Hairstylist |
| Costume & Make-Up | Lisa M. Cubero | Key Hair Stylist |
| Costume & Make-Up | Don Kozma | Assistant Makeup Artist |
| Costume & Make-Up | Frances Mathias | Hairstylist |
| Costume & Make-Up | Fleur Morell | Key Hair Stylist |
| Costume & Make-Up | Cheryl Ann Nick | Key Makeup Artist |
| Costume & Make-Up | Jerry Popolis | Hairstylist |
| Costume & Make-Up | Gerald Quist | Makeup Artist |
| Costume & Make-Up | Diana Sikes | Hairstylist |
| Costume & Make-Up | Nuria Sitja | Makeup Artist |
| Costume & Make-Up | Dina Sliwiak | Assistant Makeup Artist |
| Costume & Make-Up | Carla White | Makeup Artist |
| Production | Frédéric Bovis | Production Supervisor |
| Production | B. Ted Deiker | Production Supervisor |
| Production | Brian Esquivel | Assistant Production Manager |
| Production | Paul A. Levin | Production Supervisor |
| Directing | Mark Allan | First Assistant Director |
| Directing | Alyson Latz | Second Second Assistant Director |
| Directing | Michael Lerman | First Assistant Director |
| Directing | Chip Signore | First Assistant Director |
| Directing | Yann Thomas | Second Assistant Director |
| Directing | Peter Thorell | Second Assistant Director |
| Crew | Peewee Piemonte | Stunt Coordinator |
| Crew | Laurence Todd Rosenthal | Stunt Double |
| Crew | Trampas Thompson | Stunt Double |
| Sound | Steve Cantamessa | Sound Mixer |
| Sound | Eugene Gearty | Sound Effects Editor |
| Sound | Bret Johnson | Sound Re-Recording Mixer |
| Sound | Scott La Rue | Boom Operator |
| Sound | Jessica Parks | Apprentice Sound Editor |
| Sound | Gary Thomas | Boom Operator |
| Sound | Larry Wineland | Assistant Sound Editor |
| Crew | Nikki Amoriasino | Special Effects |
| Crew | Chris Cline | Special Effects Technician |
| Crew | Phil Gauvin | Special Effects |
| Visual Effects | Josh Hakian | Special Effects Supervisor |
| Crew | Kizuku Kitano | Special Effects |
| Costume & Make-Up | Patrick Magee | Prosthetics |
| Crew | Mike Najera | Special Effects |
| Costume & Make-Up | Lee Romaire | Prosthetics |
| Crew | David Waine | Special Effects Coordinator |
