“Guardians of the Galaxy Vol. 2” is written and directed by James Gunn (“Guardians of the Galaxy,” “Slither”). The film marks the return of the original Guardians, including Chris Pratt (“Jurassic World,” “Guardians of the Galaxy”) as Peter Quill/Star-Lord; Zoe Saldana (“Guardians of the Galaxy,” “Star Trek Into Darkness”) as Gamora; Dave Bautista (“Spectre,” “Guardians of the Galaxy”) as Drax; Vin Diesel (“Guardians of the Galaxy,” “Furious 7”) as the voice of Groot; Bradley Cooper (“Joy,” “American Sniper”) as the voice of Rocket; Michael Rooker (“Guardians of the Galaxy,” “Jumper”) as Yondu; Karen Gillan (“Guardians of the Galaxy,” “The Big Short”) as Nebula; and Sean Gunn (“Guardians of the Galaxy,” “Gilmore Girls”) as Kraglin.