David Harbour
Hellboy / Anung Un Rama
Milla Jovovich
Vivienne Nimue, the Blood Queen
Ian McShane
Trevor "Broom" Bruttenholm
Sasha Lane
Alice Monaghan
Daniel Dae Kim
Ben Daimio
Thomas Haden Church
Lobster Johnson
Stephen Graham
Gruagach (voice)
Douglas Tait
Gruagach
Sophie Okonedo
Lady Hatton
Alistair Petrie
Lord Adam Glaren
Brian Gleeson
Merlin
Penelope Mitchell
Ganeida
Mark Stanley
Arthur
Emma Tate
Baba Yaga (voice)
Troy James
Baba Yaga
Mario de la Rosa
Esteban Ruiz / Camazotz
Ava Brennan
Alice's Mother
Anthony Delaney
Alice's Father
Atanas Srebrev
Agent Madison
Dawn Sherrer
Agent Strode
Markos Rounthwaite
Grigori Rasputin
Ilko Iliev
Professor Doctor Karl Ruprecht Kroenen
Joel Harlow
Von Krupt
Dimiter Banenkin
Leopold Kurtz
Vanessa Eichholz
Ilsa Hepstein
Nadya Keranova
Sister #1
Maria Tepavicharova
Sister #2
Ana Tabakova
Sister #3
Terry Randal
Priest
Christopher Mata
Referee
Michael Heath
Butler
Rick Warden
Dr. Edwin Carp
Nitin Ganatra
August Swain
Kristina Klebe
Leni Riefenstahl
Charles Shannon
Sgt. Whitman
Carl Hampe
Sir Malcom Frost
Tony van Silva
Abbot
Josh Finan
Novice
Jonathan Steele
Huntsman
Simon Feek
M-11 Operative
Jasmine Audoux-Prevot
Baby Alice
Meglena Karalambova
Leprous Hag #1
Anna Bankina
Leprous Hag #2
Rut Rafailova
Leprous Hag #3
Laila Morse
Mrs. Harker
Peter Oxley
Gunsmith
Nikolay Stanoev
Monk
Manal El-Feitury
Mother
Elizabeth Mehari Kahsai
Child in Parking Lot #1
Said Barry Abdulai
Child in Parking Lot #2
Katya Peneva
Sarah Bethany Hughes
Natasha Kaplinsky
Anchorwoman
Valentin Stojanov
Man #1
Victor Rangelov
Man #2
Vasil Tsvetkov
Man #3
Joshua Samuel Hector
Man #4
John Wolfe
Horse Knight (uncredited)