Bradley Cooper Rocket (voice)
Zoe Saldaña Gamora
Vin Diesel Baby Groot (voice)
Sylvester Stallone Stakar Ogord
Chris Pratt Peter Quill / Star-Lord
Dave Bautista Drax
Michelle Yeoh Aleta Ogord
Kurt Russell Ego
Karen Gillan Nebula
Seth Green Howard the Duck (voice)
Stan Lee Executive Producer, Characters, Watcher Informant
Ving Rhames Charlie-27
James Gunn Director, Writer, Script Supervisor
Jeff Goldblum En Dwi Gast / Grandmaster (uncredited)
Laura Haddock Meredith Quill
Jack Kirby Characters
Michael Rooker Yondu
Rob Zombie Unseen Ravager
Miley Cyrus Mainframe (voice) (uncredited)
Kevin Feige Producer
Michael Rosenbaum Martinex
Pom Klementieff Mantis
Elizabeth Debicki Ayesha
Molly C. Quinn Howard's Date
Steve Gerber Characters
David Hasselhoff The Form of David Hasselhoff
Tommy Flanagan Tullk
Gregg Henry Grandpa Quill
Don Heck Thanks
Jim Starlin Characters
Larry Lieber Characters
Evan Jones Retch
Daniel Sudick Special Effects Supervisor
Steve Agee Gef
Ben Browder Sovereign Admiral
Steve Gan Characters
Chris Sullivan Taserface
Steve Englehart Characters
Rhoda Griffis Sneeper Madame
Guillermo Rodriguez Cop #2 (uncredited)
Bill Mantlo Characters
Zack Duhame Stunts
Sean Gunn Kraglin / On-Set Rocket
Keith Giffen Characters
Wyatt Oleff Young Peter Quill
Louis D'Esposito Executive Producer
Fred Raskin Editor
Christopher Boyes Sound Re-Recording Mixer
Roger Stern Thanks
Victoria Alonso Executive Producer
Sarah Halley Finn Casting
Aaron Schwartz Young Ego Facial Reference
David Acord Supervising Sound Editor, Sound Designer
Judianna Makovsky Costume Design
Dave Jordan Music Supervisor
Joe Bucaro III Stunts
Donny Carrington Kree Monk (uncredited)
Kendra Carelli Robot Courtesan
Rex Reddick Stunts
Tara Feldstein Bennett Casting
John Buscema Thanks
Alex Klein Zylak
Gene Colan Thanks
Lora Hirschberg Sound Re-Recording Mixer
Richard Christy 'Down There!'
Elizabeth Faith Ludlow Easik Mother
Jonathan Fawkner Visual Effects Supervisor
Chase Paris Casting
David Yarovesky Thanks
Christopher Townsend Visual Effects Supervisor
Chad Randall Stunts
Barbara Harris ADR Voice Casting