Hear Our Voice, a troupe made up of people affected by the Post Office scandal, left the judges emotional last week as they auditioned for the ITV show.
But fans are only just realising that the man guiding them, Will Rendle, is the same talented musician signed to Universal Publishing.
Will's band, titled Will and the People, have become known for their unique sound that blends modern rock with reggae, drawing inspiration from the likes of Bob Marley and Freddie Mercury.
As their lead, Will has written an array of songs that reflect his diverse musical talents.
Founded in 2010, the group have released a string of singles as well as a Live from Lockdown EP.
But the talented star has also kept busy with Hear Our Voice.
Taking to Reddit, one fan put the dots together, writing: "For anyone who watched Britain’s Got Talent on Saturday, there was a choir performing the song Falling Down. As I was watching, I thought the lead singer had one of the most amazing voices I’ve ever heard.
"I looked up the song & found out it’s by a band called Will and the People, released in March 2024. His voice sounds exactly the same as the singer in the choir. Was that actually him on stage with them, or just someone with a very similar voice? Probably a daft question, but I had to ask!"
Someone replied: "Yes, it was him - he led the choir."
In moving scenes from Saturday's episode, Simon Cowell told the singers that what happened to them was ‘disgusting’.
As they took to the stage, choir member Tim told the judges: “We only meet up when we were going through terrible times, and we wanted to put something together that gave us some joy.”
Looking very sympathetic, Simon commented: “What happened I think was just shocking and I really hope that you win this battle because it was disgusting how you were all treated, I mean seriously, disgusting.”
Another member, Jess said: “We're just a very big family that have got together to let our voices out and let the world know that we're all going to get through this fight.”
Simon added: “And win.”
The Post Office scandal is widely considered to be one of the most shocking miscarriages of justice in UK history.
The lives of hundreds of sub-postmasters were ruined when computer system glitches led them to be wrongly accused of theft, false accounting and fraud.
The harrowing story was recently retold in the ITV drama Mr Bates Vs The Post Office, which has left viewers appalled and astonished.
It traces the scandal back to 1999, when the Post Office first brought in an accounting system called Horizon, and follows the lives that were ruined in its wake.
Between its launch and 2015, more than 700 sub-postmasters were prosecuted based on information provided by Horizon, which was later found to have “bugs, errors and defects”.
Meanwhile victims were forced to declare bankruptcy, pay off sizeable sums out of their own pocket, sell their homes, and some even spent time in prison.
Wronged sub-postmaster Alan Bates and five others led a campaign to highlight the miscarriage of justice and took the Post Office to court on behalf of 555 claimants.
In 2019 the High Court ruled in their favour and found Horizon was “not robust”. They ordered the Post Office to pay out more than £58million.
Of the 736 prosecutions identified, 83 of the convictions had been overturned by 2022 - but justice didn’t come fast enough for some, including four sub-postmasters who took their own lives and 33 who died.