Cee Lo Green Wants to Know 'Can a Song Save Your Life'?

The upcoming movie from "Once" mastermind John Carney is getting a dose of delicious southern-fried soul courtesy of Cee Lo Green. The Grammy-winning musician and friend to Muppets everywhere is taking a break from stroking his fluffy white cat on "The Voice" to join the star-studded cast of "Can a Song Save Your Life?"

In what's sure to be a stretch, Green will be playing a successful rapper named Troublegum who helps out his old producer Dan (Mark Ruffalo) as Dan tries to resuscitate his career. Dan inadvertently discovers a young lady with a great pair of pipes named Gretta (Keira Knightley) at an open mic show in New York City, just before she's about to throw in the towel and head back home. Dan enlists a bunch of people to contribute to Gretta's debut, including some of Troublegum's collaborators.

It just so happens that Gretta's about to ditch her dreams of singing stardom because she was brutally dumped by her boyfriend, a musician who was offered a big fat solo contract soon after they arrived in New York City. And who's that boyfriend? Cee Lo's comrade on "The Voice," Adam Levine.

Filming starts in NYC next week, so there's probably not enough time to write in parts for Christina Aguilera and Blake Shelton before then. (Whew.)

Catherine Keener and Hailee Steinfeld round out the cast as Dan's estranged wife Miriam and daughter Violet, respectively.

Hey, if Gwyneth Paltrow can hold her own with Cee Lo, we feel certain Keira Knightley can as well.