Watch the official "#1 in the Galaxy" trailer for the Marvel superhero movie Guardians of the Galaxy Vol. 3, directed by James Gunn.<br /><br />Guardians of the Galaxy Vol. 3 Cast:<br /><br />Chris Pratt, Zoe Saldaña, Dave Bautista, Vin Diesel, Bradley Cooper, Karen Gillan, Pom Klementieff, Elizabeth Debicki, Sean Gunn, Sylvester Stallone, Will Poulter, Chukwudi Iwuji and Maria Bakalova.<br /><br />Guardians of the Galaxy Vol. 3 is now playing on the big screen!
