Mila Kunis has joined ShadowMachine's R-rated stop-motion animated comedy, Hell & Back.

The film follows, two best friends (Nick Swardson and T.J. Miller) as they rescue their buddy who has been accidentally dragged to Hell.

RELATED: Hell & Back Trailer: R-Rated Stop Motion Movie First Look

The actress plays Deema, a female demon whose ability to navigate the underworld makes her the toughest rogue demon in Hell. Her independent streak may come from her greatest secret: She's half-human. She was sired by the Orpheus of myth when he traveled down the River Styx years ago. What the myths don't say is that he was nailing everything that moved. When Orpheus is revealed to be...well, a bit of a tool, frankly...Deema has to look inside to figure out what it means to be human.

ShadowMachine's Corey Campodonico has this to say about her joining the film:

"We're thrilled to have Mila involved. Her unique blend of comedy and charm fits perfectly with what is sure to be one of the most memorable animated female characters in a long time," he said.