Chukwudi Iwuji: The High Evolutionary
Bradley Cooper: Rocket (voice)
Pom Klementieff: Mantis
Dave Bautista: Drax
Karen Gillan: Nebula
Vin Diesel: Groot (voice)
Austin Freeman: On-Set Groot / Phlektik Guard
Stephen Blackehart: Steemie Blueliver
Terence Rosemore: Xlomo Smeth
Maria Bakalova: Cosmo (voice)
Sean Gunn: Kraglin / Young Rocket
Sarah Alami: Ssssaralami
Jasmine Munoz: Hoobtoe
Chris Pratt: Peter Quill / Star-Lord
Giovannie Cruz: Orloni Peddler
Will Poulter: Adam Warlock
Nico Santos: Recorder Theel
Miriam Shor: Recorder Vim