Beating S Club star Rachel Stevens and Irish singer Niall Breslin (Bressie) - who both had acts in the competition's grand final - Una was crowned as the winning coach after her act Patrick stole the public vote.
Following her team's win, she tweeted: "SO incredibly proud of @iampatrickd - the new Voice Of Ireland!!! @rtethevoice."
Una shared a photo with her champ to Twitter and the mum-of-two looked incredibly gorgeous for the show's final, rocking a sassy LBD with a long flowing back.
Shortly after her victory, the starlet's husband and rugby pro Ben Foden made sure to congratulate his wife on her latest success.
He tweeted: "Well done to my beautiful wife @UnaTheSats and @iAmPatrickD for winning @RTETheVoice very proud! #smashedit #proud."
While Una has been working on the talent contest, Ben has made sure to support her, even joining her on set of The Voice -although we reckon it was just so he could try out her big red chair!
Like Ben, Una's fellow coach Rachel too took to Twitter following the show, gushing about the Irish beauty.
Proving she's not a sore loser, Rachel shared a very glam photo of herself and Una backstage together, along with the tweet: "Me and my fabulous winning coach and new gal pal @UnaTheSats, really loved it! #newbies! xxx."
This series saw Una and Rachel join The Voice of Ireland panel, replacing Irish musician Dolores O'Riordan and Loose Women star Jamelia.
Westlife star Kian Egan is the fourth coach to make up the panel, returning for his third season on the show.
For exclusive competitions and amazing prizes visit Reveal's Facebook page NOW!