When the denizens of Littlehampton – including conservative Edith – begin receiving letters full of hilarious profanities, rowdy Irish migrant Rose is charged with the crime. Suspecting something amiss, the town's women band together to investigate.
Unfortunately the movie Wicked Little Letters is not yet available on HBO Max.
| Production | Farhana Bhula | Executive Producer |
| Production | Tom Carver | Executive Producer |
| Production | Ron Halpern | Executive Producer |
| Production | Anna Hintzen | Co-Producer |
| Production | Ben Knight | Executive Producer |
| Production | Diarmuid McKeown | Executive Producer |
| Production | Joe Naftalin | Executive Producer |
| Production | Jo Wallett | Producer |
| Camera | Ben Davis | Director of Photography |
| Editing | Melanie Oliver | Editor |
| Production | Jina Jay | Casting |
| Art | Romain Hémeray | Art Direction |
| Art | Alice Sutton | Art Direction |
| Costume & Make-Up | Charlotte Walter | Costume Design |
| Costume & Make-Up | Samuel James | Wigmaker |
| Costume & Make-Up | Denise Kum | Makeup Designer |
| Costume & Make-Up | Denise Kum | Hair Designer |
| Costume & Make-Up | Xanthia White | Makeup Supervisor |
| Sound | Martin Beresford | Sound Mixer |
| Sound | Caitlin McDaid | ADR Mixer |
| Sound | Rob Price | Foley Mixer |
| Crew | Matthew Stirling | Stunt Coordinator |
| Directing | Thea Sharrock | Director |
| Writing | Jonny Sweet | Writer |
| Production | Olivia Colman | Producer |
| Production | Ed Sinclair | Producer |
| Production | Graham Broadbent | Producer |
| Production | Peter Czernin | Producer |
| Sound | Isobel Waller-Bridge | Original Music Composer |
| Art | Cristina Casali | Production Design |
| Production | Daniel Battsek | Executive Producer |
| Production | Simon Bird | Executive Producer |
| Production | Ollie Madden | Executive Producer |
| Production | Anna Marsh | Executive Producer |
| Production | Jonny Sweet | Executive Producer |
| Art | Fabrice Spelta | Supervising Art Director |
| Art | Shonagh Smith | Set Decoration |
| Costume & Make-Up | Rebecca Cole | Makeup & Hair |
| Costume & Make-Up | Carolyn Cousins | Makeup & Hair |
| Costume & Make-Up | Gemma Hoff | Makeup & Hair |
| Costume & Make-Up | Felicity Wright | Makeup & Hair |
| Directing | Simon Hedges | First Assistant Director |
| Directing | Michael King | Third Assistant Director |
| Directing | Jo Tew | Second Assistant Director |
| Art | Sam Farr | Set Dresser |
| Sound | Oliver Brierley | Sound Re-Recording Mixer |
| Sound | Matt Coster | ADR Mixer |
| Sound | Chris Durfy | Production Sound Mixer |
| Sound | George Elliott | Sound Mix Technician |
| Sound | Mark Henry | ADR Recordist |
| Sound | Adam Laschinger | Sound Mixer |
| Sound | Alan Leer | ADR Mixer |
| Sound | Romi Martinez | ADR Recordist |
| Sound | Ben Meechan | Supervising Sound Editor |
| Sound | Ken Nnganyadi | ADR Mixer |
| Sound | Nina Norek | Dialogue Editor |
| Sound | Mike Prestwood Smith | Sound Re-Recording Mixer |
| Sound | Matthew Skelding | Supervising Sound Editor |
| Sound | Jacob Stripp | Sound Effects Editor |
| Sound | Jason Swanscott | Foley Artist |
| Crew | Danny Hills | Special Effects Technician |
| Visual Effects | Graham Hills | Special Effects Supervisor |
| Crew | Peter Kersey | Special Effects |
| Visual Effects | Chris Reynolds | Special Effects Supervisor |
| Visual Effects | Gastón Batlle | Visual Effects |
| Crew | Elliot Best | Visual Effects Editor |
| Visual Effects | Eleanor Cook | Visual Effects Coordinator |
| Visual Effects | Ciaran Crowley | Visual Effects Supervisor |
| Crew | André de Beer | Visual Effects Editor |
| Crew | Clara Hargreaves | Visual Effects Editor |
| Visual Effects | Rosalien van der Bom | Visual Effects Producer |
| Crew | Niel Vosloo | Visual Effects Editor |
| Camera | Leigh Gold | First Assistant Camera |
| Camera | Filippo Maso | Second Assistant Camera |
| Camera | Julian Morson | Steadicam Operator |
| Lighting | Onx Narang | Gaffer |
