The talent show spin-off will feature exclusive behind-the-scenes access and special live performances.
Zoe, who also hosts Strictly Come Dancing's sister show Strictly: It Takes Two, will front the new series that will air weeknights at 6.30pm between the first live show and the live grand finale.
Like ITV2's The Xtra Factor and C5's Big Brother's Bit On The Side, the show will delve into the stories that the main show just doesn't have time to tell.
It will also feature exclusive interviews from coaches Kylie Minogue, will.i.am, Sir Tom Jones and Ricky Wilson as well as special live performances from the finalists.
Zoe says of her role on the show, which is yet to be named: "I'm super excited to be involved in The Voice, and I'm doing some star jumps and squats to limber up for action as I speak.
"Fans can think of me as the nosey naughty one who can ask questions we all want answering by their favourite acts and of course Kylie, Tom, will.i.am and Ricky.
"I shall bring everyone a little closer to the action and I promise not to sing!"
The Voice UK returns with its sixth episode on Saturday 15 February at 7.10pm on BBC1.
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Watch all four judges turn around for Jade Mayjean Peters' performance of 'Sweet About Me' in the blind auditions: