Unseen footage from Britain’s Got Talent shows the hilarious moment Ant and Dec managed to pull a prank on Simon Cowell.

In the clip, which will air on Saturday, the TV double act drive the golden buzzer mobile to judges Simon Cowell, 63, Amanda Holden, 53, Alesha Dixon, 46, and Bruno Tonioli, 69.

The gleaming Volkswagen van pulls up to pick up the four talent show icons as Ant’s voice booms through the speakers, ‘You’re very own golden buzzer mobile!’

Simon jumps behind the wheel while the others sit as passengers.

Dec begins to pull some of the vinyl off the driver’s side door and Simon asks, ‘Why are you taking the gold off?’

‘No no, the gold is still on there,’ Ant replies. ‘I’m just polishing it.’

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Unseen footage from Saturday’s episode of Britain’s Got Talent shows the hilarious moment Ant and Dec manage to pull a prank on Simon Cowell

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Dec begins to pull some of the vinyl off the driver’s side door, revealing a sticker of a toilet, and Simon asks, ‘Why are you taking the gold off?’

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The TV double act drive the golden buzzer mobile to judges, Alesha Dixon, left, Simon Cowell, Amanda Holden, and Bruno Tonioli, right,

As a cartoon of someone sat on the toilet is revealed, the comic pair then encourages Simon to rest his arm on the side with the window down, making it appear like the cartoon is him.

‘That has made my day!’ Made my year!’ Ant exclaims as Dec bursts into laughter.

Footage then shows Simon driving the vehicle around Blackpool with the toilet cartoon on the side of his door.

Another clip from this Saturday night’s episode shows rapper KSI as he eats a Yorkshire Pudding left on stage from an act.

‘You know what, I’m going to try some,’ he says before picking the food up from the floor.

The crowd erupts as KSI bites into the Yorkshire Pudding and grimaces before saying, ‘It’s not very good.’

‘Well I could’ve told you that,’ Alisha quips.

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As a cartoon of someone sat on the toilet is revealed, the comic pair  then encourage Simon to rest his arm on the side with the window down, making it appear like the cartoon is him

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Footage then shows Simon driving the vehicle around Blackpool with the toilet cartoon on the side of his door

The new series of Britain’s Got Talent kicked off on February 22 and has already seen plenty of jaw-dropping acts.

Judges were left completely speechless by a naked comedian on last Saturday’s episode.

Japanese performer Akira stood at the front of the stage – using just a tray to protect his modesty – as the judges and audience watched in shock at the daring routine.

The act, which Akira has been perfecting for over a decade, saw him pull off a series of tricks while keeping himself covered.

Three-time Guinness World Record holder Auzzy Blood also brought sword swallowing to the stage and left the judges open-mouthed as they watched in fear.

During his performance, Auzzy put a corkscrew and meat hook through his head and nose, and out of his mouth.

The scene was so dangerous that a warning was put out so viewers do not try the stunt at home – with Dec reiterating the point during the segment.

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Another clip from Saturday night’s episode shows rapper KSI, pictured, as he eats a Yorkshire Pudding left on stage from an act

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The crowd erupts as KSI bites into the Yorkshire Pudding and grimaces before saying, ‘It’s not very good.’

The horror-stricken act was dressed head to toe gothic attire and had painted their face in a skeleton like face paint.

After twisting the corkscrew and hooks, he then inserted a tube into their nose and out their mouth, instructing Simon to drink from it.

For the final part of the terrifying act, he pulled himself up into the air from a rope with a hook hanging from their mouth and nose.

Throughout the entire gruesome segment, the audience screamed in terror and all four judges turned their faces and chairs away.