The trailer is out for the upcoming film "Megan Leavey," staring Kate Mara as the Marine Corps Corporal.

Former "House of Cards" star Kate Mara will play Leavey, a former Marine Corps Military Police K-9 handler who served two tours of duty in Iraq.

The film tells the true story of Leavey and her K-9 partner Rex. Both were injured when an IED was remotely detonated, causing a serious head injury for the Cpl., according to New York City’s CBS affiliate.

Rex was still needed in the military when Leavey was discharged in 2008, leading to a lengthy battle to adopt the dog. Leavey’s efforts to adopt Rex would eventually involve Sen. Chuck Schumer of New York.

The film is directed by , who directed the 2013 documentary "Blackfish." It also stars Bradley Whitford, Common and Edie Falco. 

"Megan Leavey" hits theaters this June.