Impressionist Les Gibson and young dancer James Hobley are the latest contestants to make it through to the Britain's Got Talent final.
And Simon Cowell was so impressed with Les's take on the show's presenter Declan Donnelly that he joked he could replace him.
The judge also made a veiled reference to Cheryl Cole's sacking from the US X Factor in his praise for Les - who won the most public votes in the latest semi final.
"Ant and Les has got a nice ring to it. As we know, that's showbusiness," he said.
Dec replied: "He's got it right in for the Geordies this week," leading Simon to admit: "I'm in so much trouble tomorrow."
It was confirmed earlier this week that Cheryl would not be a judge on this year's UK X Factor after being sacked from the US version too.
Les' performance, which included mimicking Alan Sugar, Gordon Ramsay and Ross Kemp - as well as Ant and Dec - earned strong praise from the judges.
Comic Michael McIntyre said: "I could listen to it all night. You are a real threat in this competition."
The second spot in Saturday's final went to 11-year-old autistic dancer James, who won the judges' vote over handbell ringers Gay and Alan Cooper.
Michael said the youngster was "sensational" and admitted: "I'm a little bit obsessed by him."
Simon ended the programme by saying there would be "a special announcement" on Thursday night.
"You know how we like twists on the show," he added.