Elba stars as Stacker Pentecost, an officer in the war against an army of giant monsters that have emerged from the sea.
In order to combat the monsters, a fleet of giant man-piloted robots has been created.
Charlie Hunnam and Rinko Kikuchi play two pilots who may just represent humanity's final hope.
Ron Perlman, Charlie Day, Max Martini, and Robert Kazinsky also star.
Guillermo Del Toro directs the film, which is an homage to Japanese Kaiju films.
Pacific Rim will premiere July 12.