Chris Pratt
Peter Quill

Zoe Saldaña
Gamora

Dave Bautista
Drax

Vin Diesel
Groot (voice)

Bradley Cooper
Rocket (voice)

Lee Pace
Ronan

Michael Rooker
Yondu Udonta

Karen Gillan
Nebula

Djimon Hounsou
Korath

John C. Reilly
Corpsman Dey

Glenn Close
Nova Prime

Benicio del Toro
The Collector

Laura Haddock
Meredith Quill

Sean Gunn
Kraglin / On Set Rocket

Peter Serafinowicz
Denarian Saal

Christopher Fairbank
The Broker

Wyatt Oleff
Young Quill

Gregg Henry
Grandpa

Solomon Mousley
Meredith's Brother

Robert Firth
Dr. Fitzgibbon

Melia Kreiling
Bereet

Tom Proctor
Horuz

Nick Holmes
Horuz' Mate

Max Wrottesley
Sacrificed Nova Corpsman

Stan Lee
Xandarian Ladies' Man

Nicole Alexandra Shipley
Pretty Xandarian

Sharif Atkins
Nova Arresting Pilot

Brendan Fehr
Corpsman Dey's Partner

Tomas Arana
Kree Ambassador

Mikaela Hoover
Nova Prime's Assistant

Emmett Scanlan
Head Riot Guard

Dominic Grant
Angry Guard

Spencer Wilding
Mean Guard

Alison Lintott
Sad Woman with Horns

Alexis Rodney
Moloka Dar

Nathan Fillion
Monstrous Inmate

Keeley Forsyth
Mottled Prisoner

Frank Gilhooley
Burly Prisoner

Alexis Denisof
The Other

Enzo Cilenti
Watchtower Guard

Richard Katz
One Legged Prisoner

Ene Frost
Rifle Guard

Ronan Summers
'Drop the Leg' Guard

Ophelia Lovibond
Carina

Laura Ortiz
Tortured Pink Girl

Marama Corlett
Pit Boss

Ekaterina Zalitko
Lady of the Boot of Jemiah

Emily Redding
Lady of the Boot of Jemiah

Stephen Blackehart
Knowhere Dispatcher

Bruce Mackinnon
One-Eyed Ravager

Ralph Ineson
Ravager Pilot

Rob Zombie
Ravager Navigator (voice)

Naomi Ryan
Nova Centurion

John Brotherton
Nova Starblaster Pilot

Graham Shiels
Alien Nova Pilot

James Gunn
Maskless Sakaaran

Douglas Robson
Maskless Sakaaran

Rachel Cullen
Corpsman Dey's Wife

Isabella Poynton
Corpsman Dey's Daughter

Imogen Poynton
Corpsman Dey's Daughter

David Yarovesky
Goth Ravager

Miriam Lucia
Crying Xandarian Citizen

Josh Brolin
Thanos (uncredited)

Lloyd Kaufman
Prisoner (uncredited)

Tyler Bates
Ravager Pilot (uncredited)

Seth Green
Howard the Duck (voice) (uncredited)

Erica Melargo
Xandar Resident (uncredited)