‘Guardians of the Galaxy Vol. 3’: Cast Can’t Stop Laughing in Gag Reel (Exclusive)

In ET’s exclusive clip, 'Guardians of the Galaxy Vol. 3' stars Chris Pratt, Zoe Saldaña, Will Poulter, Dave Bautista, Karen Gillan and more laugh in fun outtakes on set. 'Guardians of the Galaxy Vol. 3’ is available to buy only at Digital retailers on July 7, and arrives on 4K Ultra HD™, Blu-ray™ and DVD on Aug. 1.