The acrobatics beat comedy dance duo Twist & Pulse into second place, with young drummer Keiran Gaffney coming third.
Dressed in black and gold outfits, Spelbound thrilled the audience with some impressive daredevil stunts - including sending one performer flying over judge Amanda Holden's head.
The troupe not only win £100,000, they also have the honour of appearing at the Royal Variety Performance.
Simon Cowell loved their whole routine and was delighted by their win.
'That was one of the most astonishing things I have ever seen,' he told Spelbound.
'In Olympics terms that would have won a gold medal.
'The right boys and girls won on the night.'
- See the rest of the Britain's Got Talent finalists