Helena, a woman living a seemingly ordinary life, hides a dark secret—her father is the infamous 'Marsh King', the man who kept her and her mother captive in the wilderness for years. After a lifetime of trying to escape her past, Helena is forced to face her demons when her father unexpectedly escapes from prison.
Unfortunately the movie The Marsh King's Daughter is not yet available on HBO Max.
| Directing | Neil Burger | Director |
| Production | Teddy Schwarzman | Producer |
| Production | Keith Redmon | Producer |
| Production | Mark L. Smith | Producer |
| Editing | Naomi Geraghty | Editor |
| Art | Tim Grimes | Production Design |
| Art | James Dardenne | Art Direction |
| Costume & Make-Up | Faye Crasto | Makeup Artist |
| Costume & Make-Up | Michelle Côté | Hairstylist |
| Costume & Make-Up | Michelle Côté | Hair Department Head |
| Costume & Make-Up | Michelle Côté | Hair Designer |
| Costume & Make-Up | Lukas Press | Hairstylist |
| Costume & Make-Up | Jordan Samuel | Makeup Designer |
| Costume & Make-Up | Jordan Samuel | Makeup Artist |
| Costume & Make-Up | Anthony Veilleux | Tattoo Designer |
| Camera | Brendan Adam-Zwelling | Still Photographer |
| Production | Michael Heimler | Executive Producer |
| Production | Cliff Roberts | Executive Producer |
| Production | Robert Simonds | Executive Producer |
| Production | Adam Fogelson | Executive Producer |
| Production | John Friedberg | Executive Producer |
| Production | Samuel J. Brown | Executive Producer |
| Production | Charles Miller | Executive Producer |
| Writing | Karen Dionne | Book |
| Writing | Elle Smith | Screenplay |
| Writing | Mark L. Smith | Screenplay |
| Production | Mary Vernieu | Casting |
| Production | Michelle Wade Byrd | Casting |
| Costume & Make-Up | Anne Dixon | Costume Designer |
| Camera | Alwin H. Küchler | Director of Photography |
| Sound | Biko Gogaladze | Foley Artist |
| Sound | Adam Janota Bzowski | Original Music Composer |
| Production | Charles Miller | Unit Production Manager |
| Production | Lori Fischburg | Unit Production Manager |
| Directing | Urs Hirschbiegel | First Assistant Director |
| Directing | Mark Romanelli | Second Assistant Director |
| Production | Clementine Quittner | Associate Producer |
| Crew | Brian Jagersky | Stunt Coordinator |
| Crew | Amy Szoke | Stunts |
| Production | Christopher Guzman | Post Production Coordinator |
