 | Chris Pratt | .... | Peter Quill / Star-Lord |
 | Zoe Saldana | .... | Gamora |
 | Dave Bautista | .... | Drax |
 | Vin Diesel | .... | Baby Groot (Stimme) |
 | Bradley Cooper | .... | Rocket (Stimme) |
 | Michael Rooker | .... | Yondu |
 | Karen Gillan | .... | Nebula |
 | Pom Klementieff | .... | Mantis |
 | Sylvester Stallone | .... | Stakar Ogord |
 | Kurt Russell | .... | Ego |
 | Elizabeth Debicki | .... | Ayesha |
 | Chris Sullivan | .... | Taserface |
 | Sean Gunn | .... | Kraglin / On-Set Rocket |
 | Tommy Flanagan | .... | Tullk |
 | Laura Haddock | .... | Meredith Quill |
 | Aaron Schwartz | .... | Young Ego Facial Reference |
 | Hannah Gottesman | .... | Sovereign Chambermaid |
 | Hilty Bowen | .... | Sovereign Pilot |
 | Ben Browder | .... | Sovereign Admiral |
 | Alex Klein | .... | Zylak |
 | Luke Cook | .... | Zylak's Frenemy |
 | Evan Jones | .... | Retch |
 | Joe Fria | .... | Oblo |
 | Terence Rosemore | .... | Narblik |
 | Jimmy Urine | .... | Halfnut |
 | Stephen Blackehart | .... | Brahl |
 | Steve Agee | .... | Gef |
 | Blondy Baruti | .... | Huhtar |
 | Richard Christy | .... | 'Down There!' |
 | Rob Zombie | .... | Unseen Ravager (Stimme) |
 | Sierra Love | .... | Robot Courtesan |
 | Kendra Staub | .... | Robot Courtesan |
 | Milynn Sarley | .... | Robot Courtesan |
 | Seth Green | .... | Howard the Duck (Stimme) |
 | Molly 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 |
 | James Gunn Sr. | .... | Weird Old Man |
 | Leota Gunn | .... | Weird Old Man's Mistress |
 | Elizabeth Ludlow | .... | Easik Mother |
 | Wyatt Oleff | .... | Young Peter Quill |
 | Gregg Henry | .... | Grandpa Quill |
 | Damita Jane Howard | .... | Grandpa Quill's Friend |
 | Ving Rhames | .... | Charlie-27 |
 | Michelle Yeoh | .... | Aleta Ogord |
 | Lawrence 'Omega' Edwards | .... | Ravager (uncredited) |
 | John Jacob Anderson | .... | Shran - Ravager (uncredited) |
 | Donny Carrington | .... | Kree Monk (uncredited) |
 | Brian Clackley | .... | Alien (uncredited) |
 | Nea Dune | .... | Lovebot (uncredited) |
 | Duke Edson | .... | Humanoid Ravager (uncredited) |
 | Mike Escamilla | .... | Scrote (uncredited) |
 | Fred | .... | Cosmo the Space Dog (uncredited) |
 | Kevin Galbraith | .... | Ravager (uncredited) |
 | Elan Gale | .... | Blue Ravager (uncredited) |
 | Fred Galle | .... | Sovereign Leader (uncredited) |
 | Tahseen Ghauri | .... | Pedestrian Runner (uncredited) |
 | Jeff Goldblum | .... | Grandmaster (uncredited) |
 | Joe Heath | .... | 1980 Dairy Queen Employee (uncredited) |
 | Alphonso A'Qen-Aten Jackson | .... | Ravager (uncredited) |
 | Rodney L. James | .... | Ravager (uncredited) |
 | Don Johnson | .... | Ravager (uncredited) |
 | Michael Koske | .... | Humanoid Ravager (uncredited) |
 | Alejandro Lievano | .... | Ravager (uncredited) |
 | Heather Lupex | .... | Alien (uncredited) |
 | Andrew S. McMillan | .... | Fleeing Pedestrian (uncredited) |
 | Donald K. Overstreet | .... | Aakon Ravager (uncredited) |
 | My'Chyl Purr | .... | Krylorian (uncredited) |
 | Kimberly Rayman | .... | Ego Wife #1 (uncredited) |
 | Guillermo Rodriguez | .... | Cop #2 (uncredited) |
 | Sebastian Siegel | .... | Sovereign Guard (uncredited) |
 | Jason Speer | .... | Weak Ravager (uncredited) |
 | Eddie Terrill | .... | Ravager Humanoid (uncredited) |
 | Josh Tipis | .... | Humanoid Ravager (uncredited) |
 | Stephen Vining | .... | Ravager #7 (uncredited) |
 | Chad J. Wagner | .... | Ravenger (uncredited) |
 | Kent Wagner | .... | Sneeper Ravager (uncredited) |
 | Jason Williams | .... | Huge Guard of the Sovereign Nation (uncredited) |
 | Bo Yokely | .... | Fighter Pilot (uncredited) |
 | Cheyanna Lavon Zubas | .... | Robot Courtesan (uncredited) |