All four coaches will reunite for the BBC's singing competition, which will air in spring 2013.
Jones said of his return: "I'm really looking forward to seeing and working with Jessie, Will and Danny on the second series of The Voice. I've heard there will be some important changes that will make what is already a good, strong show even better."
Jessie J said: "I'm so happy to be back as one of the original four for series two. It's going to be even bigger and better this time and I can't wait. Bring it on."
O'Donoghue stated: "I can't wait to start the search again for the hottest vocal talent in the UK.
"I had an amazing experience last time and from what I believe, this year's gonna be bigger and better, already the level of singers auditioning has gone through the roof and I can't wait for the rest of the UK to hear and enjoy all the undiscovered artists there are out there. Tom, Will, and Jessie... Bring it on guys!!"
will.i.am added: "This season is gonna be doper than last year!"
Mark Linsey, the BBC's Controller Entertainment Commissioning, said: "I am so thrilled that our four coaches are coming back for series two. All of them are hugely talented individuals and their immense knowledge and first-hand experience in the music industry makes it a line-up that is authentic and second to none.
"They care passionately about singing and all four of them will want to be the coach that discovers the next winner of The Voice."
The show's blind audition rounds will be filmed at the BBC's MediaCityUK in Salford, Manchester in front of a live studio audience in early 2013.
In August, the BBC confirmed that it will tweak the format of The Voice UK for its second series, after its first run suffered a dramatic ratings fall during its Live Shows.
The Voice UK became BBC One's biggest entertainment launch in a decade, but viewing numbers tumbled in the latter stages of the show once the spinning chairs and Blind Auditions ended.
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