The music mogul has been joined by judges Alesha Dixon, Amanda Holden and David Walliams since 2012, but things could be about to change.
Simon Cowell was particularly impressed by traditional Irish dancing act David Geaney, who performed his routine solo, accompanied with dozens of holograms of himself as a backdrop.
Blown away by the performance, Simon, 57, clearly felt inspired.
“I think the idea was better than the execution,” he groaned. “But I love the idea that you only need one of you and everyone else can be like holograms.”
Britain's Got Talent judges Amanda Holden and Simon Cowell Amanda Holden vs Alesha Dixon Mon, April 17, 2017
Britain's Got Talent judges Amanda Holden and Alesha Dixon battle it out in the style stakes.
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Amanda Holden and Alesha Dixon flash their abs at London auditions
You don’t need to pay them
Britain's Got Talent judge Simon Cowell
He teased: “You don’t need to pay them.”
Tonight’s instalment of Britain’s Got Talent will see the judges decide which acts sail through to the week-long run of semi-finals, which kick off on Monday.
Of course, the five golden buzzer acts – Sarah Ikumu, Just Us, Daliso Chaponda, Matt Edwards and Kyle Tomlinson – have already had their places confirmed.
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David Gearney impresses with his Irish dancing on Britain's Got Talent
Britain's Got talent judges Simon Cowell, Alesha Dixon, Amanda Holden and David Walliams
Missing People’s Choir, whose place in the contest is yet to be confirmed, are currently firm favourites among bookmakers to take this year’s Britain’s Got Talent title with odds of 3/1.
Simon’s golden buzzer act Sarah trails ever so slightly behind them with odds of 9/2, while Russian contortionists, aptly titled Angara Contortion, follow in third place at 7/1.
Britain’s Got Talent continues tonight at 8pm on ITV.