Chris Pratt
Peter Quill / Star-Lord
Vin Diesel
Baby Groot (voice)
Bradley Cooper
Rocket (voice)
Sylvester Stallone
Stakar Ogord
Sean Gunn
Kraglin / On-Set Rocket
Laura Haddock
Meredith Quill
Aaron Schwartz
Young Ego Facial Reference
Hannah Gottesman
Sovereign Chambermaid
Hilty Bowen
Sovereign Pilot
Ben Browder
Sovereign Admiral
Richard Christy
'Down There!'
Sierra Love
Robot Courtesan
Kendra Carelli
Robot Courtesan
Milynn Sarley
Robot Courtesan
Seth Green
Howard the Duck (voice)
Molly C. Quinn
Howard's Date
Michael Rosenbaum
Martinex
Rhoda Griffis
Sneeper Madame
Stan Lee
Watcher Informant
David Hasselhoff
The Form of David Hasselhoff
Mac Wells
Officer Fitzgibbon
Jim Gunn Sr.
Weird Old Man
Leota Gunn
Weird Old Man's Mistress
Elizabeth Faith Ludlow
Easik Mother
Wyatt Oleff
Young Peter Quill
Damita Jane Howard
Grandpa Quill's Friend
Mike Escamilla
Scrote (uncredited)
Miley Cyrus
Mainframe (voice) (uncredited)
Jeff Goldblum
En Dwi Gast / Grandmaster (uncredited)
Donny Carrington
Kree Monk (uncredited)
Nea Dune
Lovebot (uncredited)
Fred Galle
Sovereign Leader (uncredited)
Alphonso A'Qen-Aten Jackson
Ravager (uncredited)
Kelly Richardson
Daisy Kiu (uncredited)
Guillermo Rodriguez
Cop #2 (uncredited)
Josh Tipis
Humanoid Ravager (uncredited)
Jason Williams
Huge Guard of the Sovereign Nation (uncredited)
Joe Heath
1980 Dairy Queen Employee (uncredited)
Kent Wagner
Sneeper Ravager (uncredited)