The 23-year-old singer will join Sir Tom Jones, Ricky Wilson and Will.i.am for the fourth series of the show, replacing Kylie Minogue.
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Rita Ora has been confirmed as the new coach on The Voice
Confirming the news on Twitter, Rita wrote, "So excited to be part of, and for my team to win The Voice this series!!
"Let's have some fun will.i.am, Tom and Ricky! I'm really looking forward to the blind auditions - and spinning in my big red chair. EXCITED!!!"
Her fellow coaches are also clearly delighted.
"I'm really looking forward to coming back to The Voice for season four," said Sir Tom. "Not only do I get to know and work with Rita, I can once again enjoy hearing and seeing the talent that comes from just about every corner of the UK."
Black Eyed Peas star Will.i.am added, "Season four of The Voice is going to be amazing!
Rita Ora is replacing Kylie Minogue on The Voice panel
"Tom Jones is our rock, Ricky is awesome and it's our pleasure to welcome the very talented Rita Ora. Rita is sweet, spicy and sassy – she's going to be a great addition to the Coaches team."
Rita, who is currently in the charts with her collaboration with Iggy Azalea on Black Widow, has shot to international fame in the last two years, and with four UK number one singles is currently tied with Geri Halliwell as British female artist with the most solo chart-toppers.
She is set to make her movie debut in the Fifty Shades of Grey adaptation.
Rita is the only newcomer to The Voice lineup this year; presenting duo Emma Willis and Marvin Humes are also back for the new series.
The original judging panel included Jessie J and the Script’s Danny O'Donoghue, who were replaced by Kylie and Kaiser Chiefs frontman Ricky last year.