The pint-sized performer took the title a month after his initial appearance on the show, which sent the audience wild, and won him a Golden Buzzer from panellist DJ Fresh.
Yet despite his victory, he still managed to give even Kanye West a run for his money in the coolness stakes.
Seriously. Just how laid-back is he? Not to mention super-cute:
DJ Arch already had a following in South Africa before appearing on the show – having been honing his craft since he was just a year old and DJing at kids’ parties before going on the show.
However his dad Glenn said afterwards that his son’s sensational victory – which comes complete with a prize of 500,000 rand (£23,000) – will change him.
‘He’s still young and there is still a lot that will happen as he grows and matures,’ he said.
For now, he’s still a kid and he’s just going to continue as he does, he goes to crèche and DJs because he loves it.’