The legendary musician clearly couldn’t contain his excitement as his act Into The Ark made it through to the final two and was seen mouthing “f*** me” before the watershed.
Host Emma Willis was quick to apologise to viewers, saying: “There may have been a little swear word that popped out then through excitement – apologies to anybody if they were offended.”
The gaffe came during the first tense moment of Sunday night’s finale, with Sir Tom’s duo being announced as the first act through to the final two.
“Sir Tom Jones dropping the f-bomb! Classic! #thevoiceuk,” one shocked viewer wrote on Twitter.
But the drama didn’t end with Sir Tom’s ‘f-bomb’, as an audience members invaded the stage just moments later.
As Jamie Miller was eliminated in the final round, a man was seen running up on to the stage waving a large placard.
Security guards were quick to pounce on the invader, dragging him to the side of the stage as Willis tried to calm the situation.
The dramatic finale of the 2017 series of the ITV singing competition ended with favourite Mo Adeniran being crowned the winner.
After an emotional rendition of Unsteady by X Ambassadors, the 21-year-old was announced as this year’s winner, beating Into The Ark into second place.