This Is Usfirst look: Sylvester Stallone stars with Kevin in Ron Howard's war movie

As it turns out, his new costar isnt too shabby:Sylvester Stallone.

There is not a bigger action star in the history of film than Sylvester Stallone, Hartley tells EW.

Hes a walking acting class.

Ron Batzdorff/NBC

This Is Usairs Tuesdays at 9 p.m. on NBC.

Ron Batzdorff/NBC