Eagle-eyed Britain's Got Talent viewers work out 'unbelievable' magic trick that stunned judges

Eagle-eyed Britain's Got Talent fans reckon they've worked out a 'golden buzzer worthy' magic trick that left the judges stunned.

Magician Trixy stole the show over the weekend as viewers called the audition 'unreal'. Watch below:

The father-of-two began his act by borrowing Bruno Tonioli's watch and using 50 photographs throughout Simon Cowell's life.

One photo was of Simon's old 1971 Triumph TR6, in which the judge said: "That's one of my favourite ever cars."

The music mogul was then taken outside of the arena in London, where he was reunited with his beloved car on the red carpet.

The 64-year-old was taken aback by the reveal as he kissed the bonnet of the car.

Then, inside the glovebox of the vehicle was a mysterious box.

Simon Cowell didn't know what was coming. (ITV)

Simon was asked to take the box out and bring it on stage with him.

On returning to the stage, Trixy then asked Bruno to take a look inside the box. After taking a look, the judge was stunned to discover his missing watch.

Viewers said the act should have won a golden buzzer, as one person commented: "This young man was truly without a doubt not only the best performance of the night but the best act of the entire series hands down.

"I was absolutely blown away with his magic and his entire story and he genuinely seems like such a nice guy everything you want in a person.

As you can see, the BGT judge was stunned. (ITV)

"I have absolutely no doubt that this guy is going to have the biggest potential to go all the way to The Final as I hand on heart think we could be looking at."

A second viewer penned: "HOLDER OF THE GOLDEN BUZZER IN MANY PPLE HEARTS.... HE DESERVED A GOLDEN BUZZER."

"So many acts going through that deserved the Golden Buzzer. This was one of them," wrote a third.

However, some BGT viewers think they have figured out how the magic trick was done.

Simon was reunited with his old car. (ITV)

"I mean not that amazing to be honest #bgt just passed it on to someone on way to the car, don’t get the hype," a fourth thought.

As another added: "Somehow Trixie gave the watch to a runner and they placed it in the glovebox! Hence by the time Simon arrived at his car, the watch was already there!"

Others said: The producers told him about the car and slick camera angles mean the watch was placed in glovebox.. he was ok but not the extent they’re making out."