He is famous around the world for his literally Rock hard physique.

But fans will see former WWE star Dwayne Johnson in a whole new light after he is shown as a flabby high school student dancing in a shower in the hilarious new Central Intelligence trailer.

It sets the scenario for a remarkable reversal in fortunes when his now elite CIA assassin character tries to enlist the services of his old friend, a former teenage stud played by Kevin Hart.

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(Really) big star: Dwayne Johnson is an extremely rotund teen in an hilarious new Central Intelligence trailer

The comedic highlight of the trailer comes at the end of the action packed teaser, which shows the now dynamic duo running around in helicopters, flying through windows during shootouts and taking part in car chases.

To add some fun to the formula Kevin’s character, who ends up working as a dull accountant, is shown as the toast of the crowd in the middle of a pep rally.

The scene then cuts to an unidentified naked fat man getting jiggy in the shower, and only after he busts a few moves does it become clear just who it is.

And just to make things all the better, he is shown singing along to En Vogue’s My Lovin (You’re Never Gonna Get It)

You’ve got to roll with it: His character is initially shown with his back to the camera

Making waves: And the roly poly student is then shown getting jiggy with it

Brace yourself: Just to add to his geeky demeanour his teeth are being pulled in

So En Vogue:  He is heartily singing along to kitsch classic My Lovin (You’re Never Gonna Get It)

The fourth tenor: His character would give Luciano Pavarotti a run for his money

Fast forward to the present day and, now a mild-mannered number cruncher, Kevin’s character is dragged into the world of international espionage when he reunites with his old friend through Facebook.

And he is soon making daring escapes, dodging bullets and generally in constant terror for his life

The new comedy action film, which also stars Ed Helms, is scheduled for a June 2016 release.

He’s hot off the release of San Andreas – a critical bomb but huge commercial hit for the former wrestler who led the project to a worldwide box office of just under $450million.

(Relatively) Big man on campus: The pint-sized actor is a teen idol at their high school

What a difference a few decades make: Fast forward to the present day and Dwayne is a CIA hitman and Kevin is the office wimp

It beats Quickbooks class: He is squealing in terror as the screech round a corner during a chase

There goes his insurance premium: He will surely be worried about the resulting explosive crash

He’s still got it: Some of the old reflexes are clearly there as he dives out the way of an attempted hit

He previously Instagrammed a video of himself working on the set of new film Central Intelligence as he was about to film a scene that would see him being run over by stunt motorcyclist Jack Field.

‘He ran over Hugh Jackman in Wolverine,’ Dwayne explained, before exclaiming ‘I am TOUGHER than Hugh Jackman!’

The Hollywood A-lister and pro wrestler added the hasthtags ‘tougher than Jackman’ and ‘but not Wolverine’

Hugh, playing along with the joke, reposted the clip and wrote: ‘Let’s be honest @therock…you are!’

The two are known to be close friends, with the Australian actor telling David Letterman in 2013:

‘One of the coolest moments of my career, when I was speaking to him there was a knock on his trailer door…he answers and he goes “I’m talking to Wolverine, you tell them to wait on set.”‘

Speaking about his incredible physique, he also told the now-retired talk show host ‘I actually got my workout program from Dwayne Johnson, I rang him…he said here’s the deal, you workout three hours a day, 6000 calories a day.’

This is against health and safety: Kevin’s character is surely worried about the effect the shootout will have in office equipment depreciation

Literally shooting out: He takes aim at a giant glass window as they try to escape

Delivering the goods: Dwayne uses his old pal’s mail cart as a battering ram

Smashing: And the pair are then careering through the window of the skyscraper

It beats dress down Fridays: Kevin’s pencil pusher will at least have some exciting memories at the end