Chris Pratt Peter Quill
Josh Brolin Thanos (uncredited)
Nathan Fillion Monstrous Inmate
Vin Diesel Groot (voice)
Zoe Saldaña Gamora
Laura Haddock Meredith Quill
Karen Gillan Nebula
Stan Lee Executive Producer, Xandarian Ladies' Man, Thanks
Bradley Cooper Rocket (voice)
Dave Bautista Drax
Lee Pace Ronan
James Gunn Writer, Maskless Sakaaran, Director
Emmett J. Scanlan Head Riot Guard
Djimon Hounsou Korath
Benicio del Toro The Collector
Michael Rooker Yondu Udonta
Glenn Close Nova Prime
Ophelia Lovibond Carina
John C. Reilly Corpsman Dey
Ralph Ineson Ravager Pilot
Seth Green Howard the Duck (voice) (uncredited)
Sean Gunn Kraglin / On Set Rocket
Kevin Feige Producer
Gregg Henry Grandpa
Peter Serafinowicz Denarian Saal
Arslan Elver Lead Animator
Christopher Fairbank The Broker
Jack Kirby Thanks
Wyatt Oleff Young Quill
Mikaela Hoover Nova Prime's Assistant
Rob Zombie Ravager Navigator (voice)
Sharif Atkins Nova Arresting Pilot
Melia Kreiling Bereet
Brendan Fehr Corpsman Dey's Partner
Simon Hayes Production Sound Mixer
Louis D'Esposito Executive Producer
John Brotherton Nova Starblaster Pilot
Keeley Forsyth Mottled Prisoner
Tomas Arana Kree Ambassador
Clay Donahue Fontenot Stunts
Enzo Cilenti Watchtower Guard
Jim Starlin Characters
Matthew Wood Sound Designer, Supervising Sound Editor
Steve Englehart Characters
Monique Ganderton Stunt Double
Barbara Harris ADR Voice Casting
Alexandra Byrne Costume Design
Gene Colan Thanks
Marama Corlett Pit Boss
Andrew Simonin Hair Supervisor
Bruce Mackinnon One-Eyed Ravager
Andy Park Conceptual Illustrator
Marv Wolfman Thanks
Peter MacDonald Second Unit Director
Ronan Summers 'Drop the Leg' Guard
Charles Wood Production Design
Rowley Irlam Stunt Coordinator
Don Heck Thanks
Richard Baker Stereoscopic Supervisor
Alexis Denisof The Other
Sal Buscema Thanks
Sarah Halley Finn Casting
Nicole Alexandra Shipley Pretty Xandarian
Bill Mantlo Characters
Steve Gan Characters
Tyler Bates Ravager Pilot (uncredited), Original Music Composer
Lloyd Kaufman Prisoner (uncredited)
Christopher Boyes Sound Re-Recording Mixer, Supervising Sound Editor, Sound Designer
Lora Hirschberg Sound Re-Recording Mixer
Keith Giffen Characters
Elliot Hawkes Stunts
Vera Steimberg Makeup Artist