Old-school magic meets the modern world when young Alex stumbles upon the mythical sword Excalibur. He soon unites his friends and enemies, and they become knights who join forces with the legendary wizard Merlin. Together, they must save mankind from the wicked enchantress Morgana and her army of supernatural warriors.
Unfortunately the movie The Kid Who Would Be King is not yet available on HBO Max.
| Directing | Joe Cornish | Director |
| Production | Tim Bevan | Producer |
| Production | Eric Fellner | Producer |
| Costume & Make-Up | Jany Temime | Costume Design |
| Production | Nira Park | Producer |
| Writing | Joe Cornish | Writer |
| Art | Marcus Rowland | Production Design |
| Production | Rachael Prior | Executive Producer |
| Editing | Jonathan Amos | Editor |
| Camera | Bill Pope | Director of Photography |
| Editing | Paul Machliss | Editor |
| Production | James Biddle | Executive Producer |
| Crew | Elizabeth Donker Curtius | Stunt Double |
| Sound | Electric Wave Bureau | Music |
| Art | Katrina Mackay | Art Direction |
| Costume & Make-Up | Niamh O'Loan | Key Makeup Artist |
| Art | Nigel Evans | Supervising Art Director |
| Production | Nina Gold | Casting |
| Art | Jonathan Houlding | Art Direction |
| Costume & Make-Up | Claire Burgess | Key Hair Stylist |
| Production | Jessica Ronane | Casting |
| Art | Simon Elsley | Art Direction |
| Art | Sara Wan | Set Decoration |
| Editing | Jerry Ramsbottom | First Assistant Editor |
| Art | Oscar Wright | Concept Artist |
| Visual Effects | Frédéric Gaudin | VFX Artist |
| Sound | Nick Angel | Music Supervisor |
| Visual Effects | Frazer Churchill | Visual Effects Supervisor |
| Crew | Peter White | Stunt Coordinator |
| Crew | Paul Jennings | Stunt Coordinator |
| Camera | Jonathan 'Chunky' Richmond | "A" Camera Operator |
| Camera | Jonathan 'Chunky' Richmond | Steadicam Operator |
| Camera | Chris Bain | "B" Camera Operator |
| Camera | Matt Windon | First Assistant "A" Camera |
| Camera | Russell Kennedy | First Assistant "B" Camera |
| Camera | Ian Jackson | Second Assistant "A" Camera |
| Camera | Harry Gamble | Second Assistant "B" Camera |
| Camera | Lisa MacGregor | Camera Loader |
| Camera | Ewan Sadler | Camera Trainee |
| Camera | Jay Patel | Digital Imaging Technician |
| Camera | Kerry Brown | Still Photographer |
| Directing | Richard Graysmark | First Assistant Director |
| Directing | Stewart Hamilton | Second Unit First Assistant Director |
| Directing | Paul Jennings | Second Unit Director |
| Directing | Tom Rye | Second Assistant Director |
| Directing | Fraser Fennell-Ball | Second Assistant Director |
| Sound | Colin Nicolson | Production Sound Mixer |
| Directing | Paula Casarin | Script Supervisor |
| Crew | Henry Kemplen | Visual Effects Editor |
| Production | Rachael Havercroft | Post Production Coordinator |
| Lighting | Eddie Knight | Gaffer |
| Lighting | Lee Knight | Best Boy Electric |
| Camera | Malcolm Huse | Key Grip |
| Camera | Keith Mead | Best Boy Grip |
| Camera | Eugene McDonagh | Best Boy Grip |
| Camera | Alex Fraser | Grip |
| Camera | Ricky Hall | Grip |
| Camera | Emmet Cahill | Grip |
| Costume & Make-Up | Martin Mandeville | Costume Supervisor |
| Costume & Make-Up | Richard Davies | Assistant Costume Designer |
| Costume & Make-Up | Stephanie Hamilton-Jordan | Costume Coordinator |
| Costume & Make-Up | Sharon Martin | Makeup Designer |
| Costume & Make-Up | Sharon Martin | Hair Designer |
| Crew | Jill McCullough | Dialect Coach |
| Production | Hephzibah Craen | Production Coordinator |
| Production | Chloe Warren | Assistant Production Coordinator |
| Production | Robbie Torbuck | Production Secretary |
| Production | Betty Ainslie | Production Accountant |
| Production | David Blank | Assistant Accountant |
| Production | Rachel Limb | Payroll Accountant |
| Production | Debbie Moseley | Assistant Accountant |
| Art | Stuart Watson | Construction Manager |
| Art | Stephanie Gibbins | Construction Coordinator |
| Crew | Claudia Kalindjian | Unit Publicist |
| Sound | Jeremy Price | Sound Designer |
| Sound | Jed Loughran | Sound Effects Editor |
| Sound | Luke O'Connell | Sound Editor |
| Sound | Matthew Skelding | Dialogue Editor |
| Sound | Hugo Adams | Foley Editor |
| Sound | Sophia Hardman | Foley Editor |
| Sound | Nina Norek | Assistant Sound Editor |
| Sound | Mark Appleby | ADR Mixer |
| Sound | Lottie Wade | ADR Recordist |
| Sound | Adam Mendez | Foley Mixer |
| Sound | Matt Dunkley | Conductor |
| Sound | Matt Dunkley | Orchestrator |
| Sound | Mark Baechle | Orchestrator |
| Sound | Tony Blondal | Orchestrator |
| Sound | Richard Bronskill | Orchestrator |
| Camera | Shaun O'Dell | Second Unit Director of Photography |
| Production | Laura Richardson | Associate Producer |
| Directing | Emily Thomas | Third Assistant Director |
| Crew | Tolga Kenan | Stunts |
| Art | Rob Bliss | Concept Artist |
