But under the £350,000 ($NZ672,000) watch and away from the designer clothes and luxury cars, what his Hollywood status gets for free is a fella as fallible and prone to gaffes as every one of his fans.
The finest moment of the recent BBC documentary aired in the build-up to his fight was a one-to-one video call with Josh's childhood hero Dr Dre, an almost mythical figure in American music who has not only forged his own empire, but laid the foundations for Eminem and scores of others.
For Joshua, it seemed that surprise call with Dre, that made him mumble and blush and stutter and drop his guard for the first time since Wladimir Klitschko tagged him in round six of their incredible Wembley night.
As the rap titan lauded AJ's achievements and sent his support across the pond, the IBF and WBA king tried to articulate his appreciation for Dre's legacy as a musician and instead called him his favourite MAGICIAN!
None of AJ's entourage disrupted the call and the long-distance nature meant the newly-appointed conjurer missed the rare mistake.
But - the second the call was closed - Team Joshua set about mocking their leader mercilessly and his eight-pack stomach creased up laughing along with them.
It was the sort of mistake we have all made; called a teacher 'mum', sent the right text to the wrong girl or confused your American rap hero with Paul Daniels.
It was television gold.
There appeared no hasty need to correct themselves or insist the BBC production team edit out the footage, leaving the real jewel of the program on the canvas.
It was another glimpse at Joshua's humility, his charm and lack of pretence and it was another brief clue as to why he is breaking records up and down the country and now with trips to more football stadiums next on the agenda.
There is usually something so off-putting about the favourite - just ask Alex Ferguson's Manchester United or Floyd Mayweather - they're the superstars we pay to watch in the hope they stumble and Joshua's supreme talent should put him in that bracket.
But - perhaps like sporting icon Roger Federer - there is little underdog appeal to the moderate fan when Joshua takes centre stage.
You have to find a serious cynic in a dark pub corner or office cubicle who wants the Watford star to lose.
The life-affirming story of his incredible U-turn from convicted dealer to national treasure is well documented, the heartwarming relationship with the single mum he still lives with is revisited with each fight.
Since AJ and coach Rob McCracken hit upon a winning formula they have stuck to it like glue.
The same ropey Sheffield bed-sit remains his base when in camp and away from home comforts.
The Nandos black card he was gifted for loyal custom feeds not just his enormous appetite but that of his friends and teammates.
If Joshua's mantras revolve around staying hungry and humble then the catchphrase of those lucky enough to be around him tends to be: 'Josh hasn't changed'.
But none of it is tiresome yet and exciting chapters of title defences in American and fatherhood are still to be written.
Klitschko had the dedication and integrity but lacked the charm and charisma, David Haye had the looks but soured his story by overplaying the fame game and acting the bad boy for Tony Bellew.
Tyson Fury's Cinderella story and cabaret act should have secured him a place at boxing's top table but too many toxic outbursts wrecked his mass-market appeal and left him a tragic warning to those that follow him.
But Joshua seems cut from a different cloth, or a rich tapestry of all the best elements of the great men who went before him.
He has seen the best and worst of Mike Tyson, Lennox Lewis and Evander Holyfield and built what looks like the full package.
Right now he seems to be the sum of the best parts of all of them and - perhaps just as importantly - the best parts of all of us.
