Chris Pratt
Peter Quill / Star-Lord
Bradley Cooper
Rocket (voice)
Rhett Miller
Bzermikitokolok
Murry Hammond
Alien Band (Kortolbookalia)
Ken Bethea
Alien Band (Sliyavastojoo)
Philip Peeples
Alien Band (Phloko)
Luke Klein
Young Peter Quill
Maria Bakalova
Cosmo the Dog (voice)
Kyra Sedgwick
Kyra Sedgwick (voice)
Thomas McNamara
'Captain America'
Matthew Withers
Handsome Man
Helene D'Auria
Dispatcher (voice)
Tinashe Kajese
Officer Fitzgibbon
Barry Curtis
Officer R. Bobbitt
Rachel Luttrell
Upside-Down Cop
Giovannie Cruz
Orloni Peddler
Stephen Blackehart
Steemie
Troy Beecham
Drunken Knowherean (uncredited)
Christina R Gregg
Knowhere Citizen
Analisa Wall
Drunk Girl (uncredited)