James Gunn Wields Thor’s Hammer in Our 'Guardians of the Galaxy Vol. 2' Gallery (Updated!)

The Guardians of the Galaxy Vol. 2 cast and crew have been teasing fans awhile now with behind-the-scenes glimpses of prep and rehearsals. On Feb. 17, they got an even bigger treat: a Facebook photo from director James Gunn confirming that principal photography on the sequel has indeed begun, along with a new shot of our space crew in super-cool shadow and some cast announcements for the movie, which hits theaters on May 5, 2017. Click through to see a slideshow of the best photos so far.