Vin Diesel Groot (voice)
Sylvester Stallone Stakar Ogord
Zoe Saldaña Gamora
Linda Cardellini Lylla
Chris Pratt Peter Quill / Star-Lord
Nathan Fillion Master Karja
Dave Bautista Drax
Will Poulter Adam Warlock
Bradley Cooper Rocket (voice)
Karen Gillan Nebula
Tara Strong Mainframe (voice)
Molly C. Quinn Molly Ravager
Dee Bradley Baker Blurp (voice)
Judy Greer War Pig (voice)
Michael Rooker Yondu
Michael Rosenbaum Martinex
James Gunn Writer, Lamb-Shank (voice), Director
Stan Lee Characters
Pom Klementieff Mantis
Sarah Reagin Clemmensen Stunts
Seth Green Howard the Duck (voice)
Elizabeth Debicki Ayesha
Ira M. Hammons-Glass Key Costumer
Pete Davidson Phlektik
Sarah Halley Finn Casting
Cara Marie Chooljian Stunts
Christopher TJ McGuire "B" Camera Operator
Kevin Feige Producer
R. Matthew Scheib Stunts
Kim M. Holly Key Costumer
Greg D'Auria Editor
John M. 'Jack' Wright Costume Supervisor
Daniel Bernhardt Stunts
Kirk A. Jenkins Stunts
Daniela Melchior Ura
Gregg Henry Grandpa Quill
Jeffrey A. Humphreys Boom Operator
Roy Thomas Thanks
Miriam Shor Recorder Vim
Amir R. Khan Second Assistant Director
Sean Gunn Kraglin / Young Rocket (voice)
Maria Bakalova Cosmo (voice)
Keil Oakley Zepernick Stunts
Christopher Fairbank Broker
Lars P. Winther Co-Producer, First Assistant Director
Bill McConnell Jr. Second Assistant "B" Camera
Jack Kirby Characters
Nicolas Bosc Stunts
John Roesch Foley Artist
Bobcat Goldthwait Thanks
Lloyd Kaufman Gridlemop (voice)
Tatiana S. Riegel Editor
Louis D'Esposito Executive Producer
CC Ice Stunt Double
John William Wright Humanimal Hyena
Casey Ann Zeller Stunts
Kera Dacy Script Supervisor
Benjamin Byron Davis Bletelsnort
Heidi Moneymaker Stunt Coordinator
Patrick Dunn-Baker Set Designer
Lee Orloff Sound Mixer
Mikaela Hoover Floor
Jennifer Holland Administrator Kwol
Don Heck Characters
Jim Starlin Characters
Rosemary Brandenburg Set Decoration
Dave Jordan Music Supervisor
David J. Grant Co-Producer
Hank Amos Stunts
Victoria Alonso Executive Producer
Bruce E. Merlin Pyrotechnic Supervisor
Keith Giffen Characters