Vin Diesel Groot (voice)
Sylvester Stallone Stakar Ogord
Linda Cardellini Lylla
Chris Pratt Peter Quill / Star-Lord
Nathan Fillion Master Karja
Jennifer Holland Administrator Kwol
Judy Greer War Pig (voice)
Karen Gillan Nebula
Zoe Saldaña Gamora
Pom Klementieff Mantis
James Gunn Lamb-Shank (voice), Director, Writer
Michael Rooker Yondu
Sarah Halley Finn Casting
Pete Davidson Phlektik
Seth Green Howard the Duck (voice)
Dave Bautista Drax
Bradley Cooper Rocket (voice)
Tara Strong Mainframe (voice)
Stan Lee Characters
Will Poulter Adam Warlock
Bonnie Discepolo Crying Krylorian Citizen
Maria Bakalova Cosmo (voice)
Molly C. Quinn Molly Ravager
Nicholas Verdi Stunts
Daniel Bernhardt Stunts
Kevin Feige Producer
Elizabeth Debicki Ayesha
Daniela Melchior Ura
Mikaela Hoover Floor
Dee Bradley Baker Blurp (voice)
Michael Rosenbaum Martinex
Louis D'Esposito Executive Producer
Jack Kirby Characters
Sean Gunn Kraglin / Young Rocket (voice)
Steven Shelby Stunts
Gregg Henry Grandpa Quill
Natalia Safran Controller
Sarah Irwin Stunts
Don Heck Characters
Victoria Alonso Executive Producer
Chukwudi Iwuji The High Evolutionary
Wayne Dalglish Stunt Coordinator
Miriam Shor Recorder Vim
Bobcat Goldthwait Thanks
Larry Lieber Characters
David J. Grant Co-Producer
Christopher Fairbank Broker
Randy Havens Till
Nico Santos Recorder Theel
Anisha Gibbs Stunts
Lars P. Winther Co-Producer, First Assistant Director
David E. Scott Supervising Art Director
Lloyd Kaufman Gridlemop (voice)
Ryan J. Pezdirc Second Second Assistant Director
Tiffany Smith Orgocorp Host Friniki
Aurélia Agel Stunt Double
Dave Jordan Music Supervisor
Benjamin Byron Davis Bletelsnort
Daniel Macarin Visual Effects Supervisor
Nik Korda Executive Producer
Sarah Alami Ssssaralami
Judianna Makovsky Costume Design
Sal Buscema Characters
Christopher Boyes Sound Re-Recording Mixer
Stephen Blackehart Steemie Blueliver
Molly Doyle Casting Associate
Keith Giffen Characters
Terence Rosemore Xlomo Smeth
Guy Williams Visual Effects Supervisor
Justin Trudeau Set Designer
Theo Bialek Visual Effects Supervisor
Henry Braham Director of Photography