A mysterious — and suspicious — run of ill fortune plagues a teenage girl and her mother and sister on their hillside farm in this folk story set in the dark hills of Wales during the industrial revolution.
Unfortunately the movie Gwen is not yet available on HBO Max.
| Production | Hilary Bevan Jones | Producer |
| Directing | William McGregor | Director |
| Writing | William McGregor | Screenplay |
| Costume & Make-Up | Dinah Collin | Costume Design |
| Visual Effects | Chris Reynolds | Special Effects Supervisor |
| Visual Effects | Howard Jones | Visual Effects Supervisor |
| Directing | George Every | First Assistant Director |
| Editing | Mark Towns | Editor |
| Art | Tom Coates | Art Direction |
| Art | Laura Ellis Cricks | Production Design |
| Sound | James Edward Barker | Music |
| Sound | Anna Bertmark | Supervising Sound Editor |
| Sound | Anna Bertmark | Sound Designer |
| Camera | Adam Etherington | Director of Photography |
| Production | Lizzie Francke | Executive Producer |
| Production | Paul Grindey | Executive Producer |
| Production | Fergus Haycock | Executive Producer |
| Production | Charles Moore | Executive Producer |
| Production | Tom Nash | Producer |
| Production | Adam Partridge | Executive Producer |
| Production | Andy Pryor | Casting |
| Art | Candice Marchlewski | Set Decoration |
| Art | Ellie Pash | Set Decoration |
| Costume & Make-Up | Mary Cooke | Makeup Artist |
| Costume & Make-Up | Jennifer Drew | Hairstylist |
| Costume & Make-Up | Niamh Morrison | Makeup Artist |
| Costume & Make-Up | Mary Cooke | Hairstylist |
| Sound | Jules Woods | Sound Re-Recording Mixer |
