Or will it be pensioners Malcom and Henry who together form the Pensionalities?
And this viewer votes are extra important as there is NO judges' vote in the BGT results.
David Walliams" golden buzzer act made it through as the runner-up on Monday night's show when he performed Adele's hit "When We Were Young'.
He may only be nine-years-old but he definitely doesn't lack confidence.
He said: "I want to thank Ant and Dec for spending so much money on voting me through to the next round".
Why are they the best act of the series? I love that you do stuff that I know nobody else can take away from you.
Comedic magician Matt Edwards received a standing ovation from the audience after revealing his mind-reading trick, which saw him reveal a picture of Ant and December. Despite being the "marmite act" with audiences at home, Matt was the runner-up in the second semi-final on Tuesday night.
One viewer tweeted: "When it comes to dance routines and performances 5 After Midnight just smashed it.
It reminds me of when Diversity won... it's the same kind of vibe".
Simon Cowell's golden buzzer act, Sarah Ikumu, who failed to win over the public in her semi-final, is hotly tipped to be given the wildcard.
"I'm going to be approaching it tonight with another one of my own songs, and nd I'm taking a very big risk with that, because I don't think very many people have done that before".
The judges were suitably pleased with the outcome of the night, with David Walliams remarking that Tokio would be a "fantastic ambassador for the show", and Amanda Holden agreeing: "It's awesome for ['BGT'] and it's incredible for the Royal Variety".
Judge Amanda Holden called her performance "absolutely magic and fantastic", while Simon said she would make a fitting star of a J.K. Rowling novel.