Chris Hemsworth Thor Natalie Portman Jane Foster / The Mighty Thor Christian Bale Gorr Tessa Thompson King Valkyrie Taika Waititi Korg / Old Kronan God (voice) Russell Crowe Zeus Jaimie Alexander Sif Idris Elba Heimdall 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 Brett Goldstein Hercules Stellan Skarsgård Selvig Luke Hemsworth Actor Thor Matt Damon Actor Loki Sam Neill Actor Odin Melissa McCarthy Actor Hela Ben Falcone Asgardian Stage Manager Suren Jayemanne Asgardian Stagehand Natasha Cheng Asgardian Stagehand Stephen Curry King Yakan Bobby Holland Hanton Habooska The Horrible Daley Pearson Darryl The Tour Guide Briegh Winderbaum Ship Tourist Mayzie Winderbaum Ship Tourist Izaac Winderbaum Ship Tourist Emmeline Luka Bale Infinity Conez Vendor Kieron L. Dyer Axl Simon Russell Beale Dionysus Manny Spero Chemo Ward Patient Jonny Brugh Rapu Andrew Crawford Flower God Chanique Greyling Young Frigga Brooke Satchwell Indigarrian Woman Glenda Elsa Pataky Wolf Woman Zia Kelly Pirate Woman Rosangela Fasano Alien Woman Tristan Hemsworth Kid Thor Kaan Guldur Lycan Kid Alan Dukes US Delegate Arka Das Sycophant God Nico Cortez Aztec God Josh Heuston Zeus Pretty Boy Ben Sinclair Science Friend Molly Moriarty Asgardian Kid Evan Stanhope Asgardian Kid Chong Wei Zhang Asgardian / Indigarrian (uncredited)