Funnyman Will Arnett ("Blades of Glory", TVs "Arrested Development") has joined the cast of "Jonah Hex", Legendary's action Western based on the DC Comics character.

Oscar Nominee Michael Shannon ("Revolutionary Road") is also onboard.

Jimmy Hayward is directing "Hex," whose cast also includes Josh Brolin, John Malkovich and Megan Fox. It's the story of Hex (Brolin), a scarred bounty hunter tracking a voodoo practitioner (Malk¬ovich) who wants to raise an army of the undead to liberate the South.

Arnett will play a Union soldier who enlists Hex and is blindsided by the dirty fighting style of his enemies. The role is not inherently comic.

Shannon plays Doc Cross Williams, the bizarre ringleader of a brutal gladiator circus event. The character might appear in sequels.

The Hollywood Reporter has more...