- David Harbour
- Hellboy
- Milla Jovovich
- Nimue/The Blood Queen
- Ian McShane
- Professor Broom
- Sasha Lane
- Alice Monaghan
- Daniel Dae Kim
- Major Ben Daimio
- Thomas Haden Church
- Lobster Johnson
- Penelope Mitchell
- Ganeida
- Sophie Okonedo
- Lady Hatton
- Brian Gleeson
- Merlin
- Alistair Petrie
- Lord Adam Glaren
- Laila Morse
- Gatekeeper
- Stephen Graham
- Gruagach
- Neil Marshall
- Director
- Andrew Cosby
- Screenwriter
- Lawrence Gordon
- Producer
- Lloyd Levin
- Producer
- Mike Richardson
- Producer
- Philip Westgren
- Producer
- Carl Hampe
- Producer
- John Thompson
- Executive Producer, Producer
- Matthew O'Toole
- Producer
- Les Weldon
- Producer
- Yariv Lerner
- Producer
- Mike Mignola
- Executive Producer
- Marc Helwig
- Executive Producer
- Avi Lerner
- Executive Producer
- Lati Grobman
- Executive Producer
- Christa Campbell
- Executive Producer
- Jeffrey Greenstein
- Executive Producer
- Lorenzo Senatore
- Cinematographer
- Martin Bernfeld
- Film Editing
- Benjamin Wallfisch
- Original Music
- Paul Kirby
- Production Design
- Alexei Karaghiaur
- Art Director
- Alison Harvey
- Set Decoration
- Valentina Mladenova
- Set Decoration
- Stephanie Collie
- Costume Design
- Daniel Hubbard
- Casting
