Chris Hemsworth Thor Odinson Tom Hiddleston Loki Cate Blanchett Hela Tessa Thompson Scrapper 142 / Valkyrie Jeff Goldblum En Dwi Gast / Grandmaster Idris Elba Heimdall Karl Urban Skurge / Executioner Mark Ruffalo Bruce Banner / Hulk Anthony Hopkins Odin Benedict Cumberbatch Stephen Strange / Doctor Strange Taika Waititi Korg / Surtur / Hulk (mo-cap) Rachel House Topaz Clancy Brown Surtur (voice) Tadanobu Asano Hogun Ray Stevenson Volstagg Zachary Levi Fandral Stan Lee Barber Georgia Blizzard Asgardian Date #1 Amali Golden Asgardian Date #2 Luke Hemsworth Actor Thor Sam Neill Actor Odin Matt Damon Actor Loki (uncredited) Charlotte Nicdao Actor Sif Ashley Ricardo Odin's Assistant Shalom Brune-Franklin College Girl #1 Taylor Hemsworth College Girl #2 Cohen Holloway Lead Scrapper Alia Seror-O'Neill Golden Lady #1 Sophia Laryea Golden Lady #2 Steven Oliver Cousin Carlo Hamish Parkinson Beerbot 5000 Jasper Bagg Warden Sky Castanho Asgardian Daughter Shari Sebbens Asgardian Mother Richard Green Asgardian Uncle Sol Castanho Asgardian Son Jet Tranter Valkyrie Sister #1 Scarlett Johansson Natasha Romanoff / Black Widow (archive footage / uncredited) Sam Hargrave Gladiator (uncredited)