Vin Diesel Groot (voice)
Chris Pratt Peter Quill
Nathan Fillion Monstrous Inmate
Karen Gillan Nebula
Zoe Saldaña Gamora
Benicio del Toro The Collector
James Gunn Maskless Sakaaran, Director, Writer
Josh Brolin Thanos (uncredited)
Michael Rooker Yondu Udonta
Lee Pace Ronan
Sarah Halley Finn Casting
Glenn Close Nova Prime
Seth Green Howard the Duck (voice) (uncredited)
Djimon Hounsou Korath
John C. Reilly Corpsman Dey
Dave Bautista Drax
Bradley Cooper Rocket (voice)
Laura Haddock Meredith Quill
Stan Lee Xandarian Ladies' Man, Thanks, Executive Producer
Ralph Ineson Ravager Pilot
Peter Serafinowicz Denarian Saal
Wyatt Oleff Young Quill
Zack Duhame Stunts
Kevin Feige Producer
Kyrsten Mate Sound Effects Editor
Sharif Atkins Nova Arresting Pilot
Mikaela Hoover Nova Prime's Assistant
Louis D'Esposito Executive Producer
Jack Kirby Thanks
Sean Gunn Kraglin / On Set Rocket
Casey O'Neill Stunts
Kim McGarrity Fight Choreographer
Melia Kreiling Bereet
Gregg Henry Grandpa
Brendan Fehr Corpsman Dey's Partner
Don Heck Thanks
Victoria Alonso Executive Producer
Enzo Cilenti Watchtower Guard
Emmett Scanlan Head Riot Guard
Holland Diaz Stunts
Clay Donahue Fontenot Stunts
David J. Grant Co-Producer
Nico Woulard Stunts
Christopher Fairbank The Broker
Rob Zombie Ravager Navigator (voice)
Barbara Harris ADR Voice Casting
Stephen Urata Sound Re-Recording Assistant
John Brotherton Nova Starblaster Pilot
Ophelia Lovibond Carina
Lloyd Kaufman Prisoner (uncredited)
Dave Jordan Music Supervisor
Tomas Arana Kree Ambassador
Matthew Wood Supervising Sound Editor, Sound Designer
Nik Korda Executive Producer, Unit Production Manager
Peter MacDonald Second Unit Director
Stacy Mann Publicist
Sal Buscema Thanks
Christopher Boyes Sound Re-Recording Mixer, Supervising Sound Editor, Sound Designer
Stephen Blackehart Knowhere Dispatcher
Annabel Wood Stunts
Graham Shiels Alien Nova Pilot
Keith Giffen Characters
Monique Ganderton Stunt Double
Lora Hirschberg Sound Re-Recording Mixer
Adelaide Filippe Costumer
Michael Byrch Stunts
Bryan Andrews Storyboard Artist
Spencer Wilding Mean Guard
Jan Petřina Stunt Double
Marama Corlett Pit Boss
Dan Grace Costume Supervisor
Alexis Denisof The Other