ITV aired the fourth episode of Britain's Got Talent: The Champions tonight (September 21) and now we know who else will be performing in next month's final.

Up till now, we've got salsa dancers Paddy & Nico, daring illusionist Darcy Oake, German dog enthusiast Alexa Lauenburger, dance troupe MerseyGirls, sand artist Kseniya Simonova, plus Bello and his daughter Annaliese Nock populating the final – but who were tonight's lucky pair?

Stavros Flatley, Britain's Got Talent The Champions
Syco / Thames//ITV

Related: Britain's Got Talent: The Champions' David Walliams explains his most "unpopular" Golden Buzzer choice

Having made waves in the UK series with their father-son partnership and Greek dancing routine, Stavros Flatley successfully returned to the stage by winning judge Simon Cowell's Golden Buzzer vote.

Dad Demetrios and his son Michalakis (nickname 'Lagi') couldn't contain their ecstasy and proceeded to jump around the stage hugging anyone and everyone they could – including presenters Ant and Dec.

Pointing at Simon, Demetrios shared: "Whenever you need us, forever, we'll be there. If I have to come on this stage on a mobility scooter, I will come."

Preacher Lawson, Britain's Got Talent The Champions
Syco / Thames//ITV
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This meant that only one more performer from tonight's bunch could make it to the final, and soon enough beloved winner Colin Thackery and America's Got Talent comedian Preacher Lawson were the last two standing.

Following a hilariously entertaining stand-up routine – after which judge David Walliams compared his talents to that of Eddie Murphy – Preacher was handed the second ticket to the final.

Given the microphone to respond, the American star shouted: "I don't know what to say man, I love you!"

Britain's Got Talent: The Champions returns next Saturday (September 28) on ITV.

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Dan Seddon

Reporter, Digital Spy 

Dan is a freelance entertainment journalist. Beginning his writing career in 2014, Dan's work first graced the pages of cult publications Starburst magazine and Little White Lies before moving onto Total Film, Digital Spy, NME and Yahoo Entertainment

In the film and TV universe, he kneels at the altar of Jim Carrey, Daniel Plainview, Mike Ehrmantraut and Paulie Walnuts.