Critics are in love with Sean Penn as he takes on his first full-fledged action movie in The Gunman! Open Road Films has let us debut an exclusive TV spot, which brings plenty of praise for this taut thriller. Based on Jean-Patrick Manchette's novel "The Prone Gunman," this adaptation centers on Sean Penn's Jim Terrier, a former Special Forces soldier and military contractor suffering from PTSD who tries to reconnect with his long time love. But first, he must go on the run from London to Barcelona and across Europe in order to clear his name.

Though Jean-Patrick Manchette passed away in 1995, his novel was later translated by James Brooks and published by Lawrence Ferlinghetti's City Light Books in 2002. The novel's main character is named Martin Terrier, who is renamed Jim Terrier for this adaptation, although the story is expected to follow the same basic plot from the novel. Director Pierre Morel returns to the action genre for his first film since 2010's From Paris with Love. He also directed Liam Neeson in Taken, which propelled the actor into legendary action hero status.

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Idris Elba, Javier Bardem, Ray Winstone and Mark Rylance round out the supporting cast of The Gunman, which hits theaters nationwide on March 20 from Open Road Films. Take a look at what the critics have to say, along with the latest footage from this sure-to-classic action-packed thriller. It's Sean Penn like you've never seen him before as a sniper who becomes the target of hit squad himself. He will kill 'em all!