Vin Diesel Baby Groot (voice)
Zoe Saldaña Gamora
Sylvester Stallone Stakar Ogord
Dave Bautista Drax
Chris Pratt Peter Quill / Star-Lord
Seth Green Howard the Duck (voice)
Kurt Russell Ego
Karen Gillan Nebula
Elizabeth Debicki Ayesha
Bradley Cooper Rocket (voice)
Laura Haddock Meredith Quill
Jeff Goldblum En Dwi Gast / Grandmaster (uncredited)
Michelle Yeoh Aleta Ogord
Molly C. Quinn Howard's Date
Wyatt Oleff Young Peter Quill
Gregg Henry Grandpa Quill
Ving Rhames Charlie-27
Tommy Flanagan Tullk
Pom Klementieff Mantis
David Hasselhoff The Form of David Hasselhoff
Michael Rooker Yondu
James Gunn Writer, Script Supervisor, Director
Evan Jones Retch
Chad Randall Stunts
Stan Lee Watcher Informant, Executive Producer, Characters
Michael Rosenbaum Martinex
Milynn Sarley Robot Courtesan
Rob Zombie Unseen Ravager
Miley Cyrus Mainframe (voice) (uncredited)
Chris Sullivan Taserface
Jason C. Lewis Boom Operator
Donny Carrington Kree Monk (uncredited)
Jim Palmer Stunt Double
Steve Agee Gef
Kendra Carelli Robot Courtesan
Nea Dune Lovebot (uncredited)
Kevin Kirkpatrick Prosthetic Makeup Artist
Kevin Feige Producer
Lisa J. Levine ADR Supervisor
Rhoda Griffis Sneeper Madame
Mac Wells Officer Fitzgibbon
Tyler Bates Original Music Composer
Riley Harper Stunt Coordinator
Louis D'Esposito Executive Producer
Casey Adams Stunts
Jimmy Urine Halfnut
Mike Friedrich Thanks
Hilty Bowen Sovereign Pilot
Tom Fendley Rigging Gaffer
Sean Gunn Kraglin / On-Set Rocket
Jack Kirby Characters
Jason Williams Huge Guard of the Sovereign Nation (uncredited)
Luke Cook Zylak's Frenemy
Dan Abnett Comic Book
Boni Yanagisawa Stunt Double
Leiki Veskimets Production Manager
Jarred Land Thanks
C. Alan Rawlins Sr. Key Grip
Jim Starlin Characters
Grant Harris Lead Animator
Tony McFarr Stunt Double
David Yarovesky Thanks
Joe Fria Oblo
Aaron Schwartz Young Ego Facial Reference
Jim Valentino Thanks
Guillermo Rodriguez Cop #2 (uncredited)
Barbara Harris ADR Voice Casting
Jay Hart Set Decoration
Randy James Beckman Stunts
Reid Harper Stunts
Iain McFadyen Art Direction
Fred Galle Sovereign Leader (uncredited)