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