Bradley Cooper Rocket (voice)
Zoe Saldaña Gamora
Vin Diesel Groot (voice)
Chris Pratt Peter Quill
Josh Brolin Thanos (uncredited)
Nathan Fillion Monstrous Inmate
Dave Bautista Drax
Karen Gillan Nebula
Stan Lee Executive Producer, Xandarian Ladies' Man, Thanks
Djimon Hounsou Korath
Seth Green Howard the Duck (voice) (uncredited)
Glenn Close Nova Prime
James Gunn Writer, Maskless Sakaaran, Director
Benicio del Toro The Collector
John C. Reilly Corpsman Dey
Jack Kirby Thanks
Michael Rooker Yondu Udonta
Lee Pace Ronan
Laura Haddock Meredith Quill
Rob Zombie Ravager Navigator (voice)
Kevin Feige Producer
Ralph Ineson Ravager Pilot
Peter Serafinowicz Denarian Saal
Ophelia Lovibond Carina
Don Heck Thanks
Emmett J. Scanlan Head Riot Guard
Gregg Henry Grandpa
Jim Starlin Characters
Mikaela Hoover Nova Prime's Assistant
Sharif Atkins Nova Arresting Pilot
Marv Wolfman Thanks
Brendan Fehr Corpsman Dey's Partner
Christopher Fairbank The Broker
Steve Gan Characters
Enzo Cilenti Watchtower Guard
Wyatt Oleff Young Quill
Steve Englehart Characters
Bill Mantlo Characters
Zack Duhame Stunts
Sean Gunn Kraglin / On Set Rocket
Keith Giffen Characters
Matthew Wood Sound Designer, Supervising Sound Editor
Monique Ganderton Stunt Double
Louis D'Esposito Executive Producer
Tomas Arana Kree Ambassador
Lloyd Kaufman Prisoner (uncredited)
Simon Hayes Production Sound Mixer
Steve Gerber Characters
Doc Kane ADR Mixer
Christopher Boyes Sound Re-Recording Mixer, Supervising Sound Editor, Sound Designer
Melia Kreiling Bereet
Alexis Denisof The Other
Fred Raskin Editor
Roger Stern Thanks
Paul Corbould Special Effects Supervisor
John Brotherton Nova Starblaster Pilot
Victoria Alonso Executive Producer
Sarah Halley Finn Casting
Daniel Stevens Stunt Double
Nicole Alexandra Shipley Pretty Xandarian
David Acord Sound Effects Editor, Sound Designer
Nicole Perlman Writer
Peter MacDonald Second Unit Director
Nico Woulard Stunts
Stephane Ceretti Visual Effects Supervisor
John Buscema Thanks
Bruce Mackinnon One-Eyed Ravager
Annabel Wood Stunts
Gene Colan Thanks
Lora Hirschberg Sound Re-Recording Mixer
Dave Jordan Music Supervisor
Alexis Rodney Moloka Dar