Alexander Skarsgård as Amleth

Nicole Kidman as Queen Gudrún

Claes Bang as Fjölnir the Brotherless

Ethan Hawke as King Aurvandil War-Raven

Anya Taylor-Joy as Olga of the Birch Forest

Gustav Lindh as Thórir the Proud

Elliott Rose as Gunnar

Willem Dafoe as Heimir the Fool

Phill Martin as Hallgrímr Half-Troll

Eldar Skar as Finnr the Nose-Stub

Olwen Fouéré as Áshildur Hofgythja

Edgar Abram as Hersveinn Battle-Hard

Jack Gassmann as Hjalti Battle Hasty

Ingvar E. Sigurðsson as He-Witch

Oscar Novak as Young Amleth

Jack Walsh as Hallur Freymundur

Björk as Seeress

Ian Whyte as The Mound Dweller

Katie Pattinson as Shield Maiden

Andrea O’Neill as Helga the Nanny

Rebecca Ineson as Halla the Maiden

Kate Dickie as Halldóra the Pict

Ísadóra Bjarkardóttir Barney as Melkorka

Kevin Horsham as Völundur the Smith

Seamus O'Hara as Audunn the Irish

Scott Sinclair as Grímr Skull-Hammer

Tadhg Murphy as Eiríkr Blaze-Eye

James Yates as Hrólfur Split-Lip

Hafþór Júlíus Björnsson as Thórfinnr Tooth-Gnasher

Ian Gerard Whyte as Thórvaldr Giant-Crusher

Ralph Ineson as Captain Volodymyr

Murray McArthur as Hákon Iron-Beard

Nille Glæsel as Gunnhildr Ship-Breasted

Jonas Lorentzen as Eysteinn

Magne Osnes as Berserker Priest

Ineta Sliuzaite as Valkyrja

Finn Lafferty as Fisherman’s Son

Jon Campling as Standard Bearer

Helen Roche as Hofgythja

Faoileann Cunningham as Kormlöth

Gareth Parker as The Hird Officer

Mark Fitzgerald as Hallucinating Guard

Gavin Peden as Burly Guard

Joel Hicks as Fengr Shield-Biter

Chris Finlayson as Grani Battle-Screamer

Eric Higgins as Ketill the Whale Sided

Matt Symonds as Ragnar Cold-Mouthed

Luca Evans as Ivan

James Harper-Jones as Vasill

Thomas Harper-Jones as Stanislav

Sheila Flitton as Lyudmila

Lily Bird as The Maiden King

Robin Carolan as Hawker (uncredited)

Mark P. O'Connor as Villager (uncredited)