Nick Swardson and T.J. Miller have boarded Hell & Back, in which they will voice two best friends on a journey to rescue their dead pal from Hades.

This R-rated stop motion adventure will be directed by Tom Gianas, who has worked on episodes of both Tenacious D and Nick Swardson's Pretend Time, and Ross Shuman, responsible for episodes of Robot Chicken and Moral Orel.

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The film is being produced by ShadowMachine, the company behind both Robot Chicken and Moral Orel.

Production is expected to begin early next year.