The poster for The Gunman. Sean Penn, Javier Bardem and Idris Elba stars.

A photo of Sean Penn in The Gunman. Penn stars as a hitman who is betrayed by Javier Bardem.

Sean Penn stars in The Gunman. The film is Penn's first foray into the action movie genre.

Sean Penn stars in The Gunman. The action thriller also stars Javier Bardem.

The Gunman stars Sean Penn gets into action. Javier Bardem also stars in the action thriller.

The Gunman stars Sean Penn. Javier Bardem also stars.