Vin Diesel Groot (voice)
Zoe Saldaña Gamora
Kim McGarrity Fight Choreographer
Dave Bautista Drax
Nathan Fillion Monstrous Inmate
Chris Pratt Peter Quill
Josh Brolin Thanos (uncredited)
Seth Green Howard the Duck (voice) (uncredited)
Karen Gillan Nebula
Benicio del Toro The Collector
Djimon Hounsou Korath
Bradley Cooper Rocket (voice)
John C. Reilly Corpsman Dey
Laura Haddock Meredith Quill
Wyatt Oleff Young Quill
Gregg Henry Grandpa
Glenn Close Nova Prime
Lee Pace Ronan
Michael Rooker Yondu Udonta
James Gunn Maskless Sakaaran, Director, Writer
Ralph Ineson Ravager Pilot
Miriam Lucia Crying Xandarian Citizen
Stan Lee Xandarian Ladies' Man, Thanks, Executive Producer
Nick Holmes Horuz' Mate
Brendan Fehr Corpsman Dey's Partner
Ophelia Lovibond Carina
Alison Mitchell Assistant Costume Designer
Rob Zombie Ravager Navigator (voice)
Ronan Summers 'Drop the Leg' Guard
Jan Petřina Stunt Double
Peter Serafinowicz Denarian Saal
Emmett Scanlan Head Riot Guard
Nicole Alexandra Shipley Pretty Xandarian
Tomas Arana Kree Ambassador
Sharif Atkins Nova Arresting Pilot
Melia Kreiling Bereet
Kofi Yiadom Stunts
Kevin Feige Producer
Debbi Salmon Makeup & Hair
Ene Frost Rifle Guard
Mikaela Hoover Nova Prime's Assistant
Tyler Bates Ravager Pilot (uncredited), Original Music Composer
Christopher Fairbank The Broker
Tom Proctor Horuz
Louis D'Esposito Executive Producer
Naomi Ryan Nova Centurion
Mike Friedrich Thanks
Max Wrottesley Sacrificed Nova Corpsman
Sean Gunn Kraglin / On Set Rocket
Alexis Denisof The Other
Graham Shiels Alien Nova Pilot
Frank Gilhooley Burly Prisoner
Jack Kirby Thanks
Tim Williams Additional Music, Orchestrator
Dan Abnett Comic Book
Willis Chung Digital Imaging Technician
Keeley Forsyth Mottled Prisoner
Spencer Wilding Mean Guard
Jim Starlin Characters
Steve Durkee Supervising Music Editor
Enzo Cilenti Watchtower Guard
Neil Floyd Graphic Designer
Hughes Winborne Editor
Rashid Phoenix Stunts
Tamara Hunter Casting Associate
Will Kaplan Music Editor
David Yarovesky Goth Ravager
John Brotherton Nova Starblaster Pilot
Barbara Harris ADR Voice Casting
Matthew Wood Supervising Sound Editor, Sound Designer
Reid Harper Stunts
Zack Duhame Stunts