Chris Hemsworth Thor Odinson Natalie Portman Jane Foster / The Mighty Thor Christian Bale Gorr the God Butcher Tessa Thompson King Valkyrie Taika Waititi Korg / Old Kronan God (voice) Russell Crowe Zeus Jaimie Alexander Sif Chris Pratt Peter Quill / Star-Lord Dave Bautista Drax Karen Gillan Nebula Pom Klementieff Mantis Sean Gunn Kraglin / On-Set Rocket Vin Diesel Groot (voice) Bradley Cooper Rocket (voice) Carly Rees Miek Kat Dennings Darcy Lewis Stellan Skarsgård Erik Selvig Kieron L. Dyer Axl Luke Hemsworth Actor Thor Matt Damon Actor Loki Sam Neill Actor Odin Melissa McCarthy Actor Hela Ben Falcone Asgardian Stage Manager Idris Elba Heimdall Brett Goldstein Hercules Stephen Curry King Yakan Bobby Holland Hanton Habooska The Horrible Eliza D'Souza Grace Daley Pearson Darryl The Tour Guide Simon Russell Beale Dionysus Manny Spero Chemo Ward Patient Jonny Brugh Rapu Andrew Crawford Flower God Brooke Satchwell Indigarrian Woman Glenda Elsa Pataky Wolf Woman Zia Kelly Pirate Woman Shari Sebbens Asgardian Kaan Guldur Wolfboy Yure Covich Guard Alan Dukes US Delegate Arka Das Sycophant God Nico Cortez Aztec God Priscilla Doueihy Artemis God Ava Caryofyllis Young Jane Ben Sinclair Science Friend