Vin Diesel Baby Groot (voice)
Sylvester Stallone Stakar Ogord
Karen Gillan Nebula
Dave Bautista Drax
Zoe Saldaña Gamora
Chris Pratt Peter Quill / Star-Lord
Michelle Yeoh Aleta Ogord
Kurt Russell Ego
Jeff Goldblum En Dwi Gast / Grandmaster (uncredited)
Seth Green Howard the Duck (voice)
Bradley Cooper Rocket (voice)
David Hasselhoff The Form of David Hasselhoff
James Gunn Writer, Script Supervisor, Director
Pom Klementieff Mantis
Steve Constancio Ager/Dyer
Stan Lee Executive Producer, Watcher Informant, Characters
Larry Rippenkroeger Stunt Double
Ving Rhames Charlie-27
Michael Rooker Yondu
Tommy Flanagan Tullk
Jack Kirby Characters
Elizabeth Debicki Ayesha
Laura Haddock Meredith Quill
Michael Rosenbaum Martinex
Steve Agee Gef
Miley Cyrus Mainframe (voice) (uncredited)
Deborah Rutherford Makeup Artist
Molly C. Quinn Howard's Date
Guillermo Rodriguez Cop #2 (uncredited)
Wyatt Oleff Young Peter Quill
Jim Starlin Characters
Mike Escamilla Scrote (uncredited)
Randy James Beckman Stunts
Elizabeth Faith Ludlow Easik Mother
Jules Holdren Key Hair Stylist
Jason Williams Huge Guard of the Sovereign Nation (uncredited)
Sara Cobbeldick Set Costumer
Alessandro Cioffi VFX Supervisor
Fred Galle Sovereign Leader (uncredited)
Ron Newburn Gaffer
Joe Fria Oblo
Sean Gunn Kraglin / On-Set Rocket
Mac Wells Officer Fitzgibbon
Evan Jones Retch
Sal Buscema Thanks
Louis D'Esposito Executive Producer
Christine Youngstrom Art Department Coordinator
Kevin Feige Producer
Ben Browder Sovereign Admiral
Rob Zombie Unseen Ravager
Gregg Henry Grandpa Quill
Alphonso A'Qen-Aten Jackson Ravager (uncredited)
Chris Sullivan Taserface
Kyler Dennis Second Assistant Camera
Tara Feldstein Bennett Casting
Chris Claremont Thanks
Terence Rosemore Narblik
Donny Carrington Kree Monk (uncredited)
Steve Englehart Characters
Riley Harper Stunt Coordinator
Gene Colan Thanks
Barbara Harris ADR Voice Casting
Sarah Halley Finn Casting
Casey Adams Stunts
Lisa J. Levine ADR Supervisor
Boni Yanagisawa Stunt Double
Jack Taggart Ager/Dyer
Thom Khoury Williams Utility Stunts
Lee Gilmore Sound Effects Editor
Michael Crow Assistant Costume Designer
David Yarovesky Thanks
Judianna Makovsky Costume Design