Vin Diesel Baby Groot (voice)
Sylvester Stallone Stakar Ogord
Zoe Saldaña Gamora
Chris Pratt Peter Quill / Star-Lord
Dave Bautista Drax
Seth Green Howard the Duck (voice)
Kurt Russell Ego
Stan Lee Watcher Informant, Executive Producer, Characters
Jeff Goldblum En Dwi Gast / Grandmaster (uncredited)
Michelle Yeoh Aleta Ogord
Bradley Cooper Rocket (voice)
James Gunn Writer, Script Supervisor, Director
Laura Haddock Meredith Quill
Chad Randall Stunts
Gregg Henry Grandpa Quill
Karen Gillan Nebula
Molly C. Quinn Howard's Date
Tommy Flanagan Tullk
Pom Klementieff Mantis
Miley Cyrus Mainframe (voice) (uncredited)
Michael Rooker Yondu
David Hasselhoff The Form of David Hasselhoff
Ving Rhames Charlie-27
Evan Jones Retch
Elizabeth Debicki Ayesha
Larry Rippenkroeger Stunt Double
Milynn Sarley Robot Courtesan
Rob Zombie Unseen Ravager
Michael Rosenbaum Martinex
Jason C. Lewis Boom Operator
Jim Palmer Stunt Double
Steve Agee Gef
Kendra Carelli Robot Courtesan
Tom Fendley Rigging Gaffer
Kevin Kirkpatrick Prosthetic Makeup Artist
Kevin Feige Producer
Lee Gilmore Sound Effects Editor
Sean Gunn Kraglin / On-Set Rocket
Bill Mantlo Characters
Jim Starlin Characters
Mac Wells Officer Fitzgibbon
Wyatt Oleff Young Peter Quill
Casey Adams Stunts
Jimmy Urine Halfnut
John Buscema Thanks
Mike Friedrich Thanks
Hilty Bowen Sovereign Pilot
Jack Kirby Characters
Don Heck Thanks
Steve Gan Characters
Judianna Makovsky Costume Design
Rob de Groot Stunt Double
Jason Williams Huge Guard of the Sovereign Nation (uncredited)
Tyler Bates Original Music Composer
Luke Cook Zylak's Frenemy
Daniel Sudick Special Effects Supervisor
Dan Abnett Comic Book
Boni Yanagisawa Stunt Double
Leiki Veskimets Production Manager
Tex Kadonaga Set Designer
Jarred Land Thanks
Richard Christy 'Down There!'
C. Alan Rawlins Sr. Key Grip
Carolina Jiménez Layout
Grant Harris Lead Animator
Rhoda Griffis Sneeper Madame
Nik Korda Executive Producer
Jonathan Fawkner Visual Effects Supervisor
Tony McFarr Stunt Double
Tara Feldstein Bennett Casting
Christopher Boyes Sound Re-Recording Mixer
David Yarovesky Thanks