With absolutely no backing tracks, no instruments and no second chances Sing: Ultimate A Cappella brings together 30 brilliant and diverse a cappella groups in a competition based on raw vocal talent.
Host Cat Deeley makes a welcome return to British TV in her first UK presenting role since becoming a mainstay of American TV.
Starting on October 6, Sky says the new series will be "the UK’s first authentic a cappella singing contest".
Across seven episodes, the groups will be tested in three rounds - a medley round, iconic artist covers and a final showdown between two groups – and unlike other shows there will be no backing tracks or instruments to hide behind.
Groups will compete in six heats where they'll be judged by experts from the world of a cappella as they attempt to secure a place in the final. The ultimate winning group will get the opportunity to record an album at the iconic Abbey Road Studios, and have a single released in time for Christmas.
House group multi-award-winning vocal collective The Sons of Pitches will perform each week, as well as a famous musical guest.
Speaking about the series Cat Deeley said: “I couldn't be more excited about Sing It...I remember singing in choir, when I was a kid and loving every minute!
"We have the very best performers on the show - they have no backing tracks and no instruments, just their own incredible voices and talent!
"The British a cappella scene is so exciting and I'm thrilled to be able to be a part of it."
The Sons of Pitches told FloVoice: "What makes 'Sing: Ultimate A Cappella' very unique is that it is the first UK show to be purely a cappella.
"Every single sound you hear on the show will be made with the human voice!"
"As house band we will be singing in and out of the breaks and will basically make noise in any other moments of would-be silence!" The Sons of Pitches said. "We also open and close the show every night. Lastly, we'll be part of some special guest collaborations."
Sing: Ultimate A Cappella begins October 6 on Sky 1.