He is embroiled in an acrimonious divorce with estranged wife Petra Ecclestone.
And James Stunt revealed his dramatic weight loss as he stepped out in London on Sunday.
The 35-year-old businessman, who was once estimated to be worth £3bn, cut a very slimline figure on his night at Mayfair members club LouLou’s, as he sipped on a fruit drink, flanked by burly bodyguards.
Change: James Stunt revealed his dramatic weight loss as he stepped out at private members club LouLou’s in Mayfair, London on Sunday
Transformation: The 35-year-old businessman, who was once estimated to be worth £3bn, cut a very slimline figure on his night at Mayfair members club LouLou’s, as he sipped on a fruit drink, (pictured above with estranged wife Petra Ecclestone in 2013)
The father of three kept his look casually cool for the evening, dressed in a navy sweater, and white t-shirt that hugged his slender midriff and baggy jeans, which billowed around his trim legs.
His hair was worn in his signature slicked back style and he was accompanied by his usual fleet of luxury cars.
He was still wearing his wedding ring.
James began to shed weight last year after previously sporting a more relaxed physique.
The outing came as James’ bitter £5.5bn divorce from the daughter of F1 mogul Bernie Ecclestone continues.
Dapper: His hair was worn in his signature slicked back style and he was accompanied by his usual fleet of luxury cars and two muscular bodyguards
Different: The father of three kept his look casually cool for the evening, dressed in a navy sweater, and white t-shirt that hugged his slender midriff and baggy jeans, which billowed around his trim legs (pictured right in 2012)
Trim: James began to shed weight last year after previously sporting a more relaxed physique
Leading the way: James’ smartly dressed bodyguards led the way as he headed to his waiting car
Night out; James was still wearing his wedding ring as he stepped out
Relaxed: James climbed into the back of his Rolls Royce clutching his water bottle
The battle could go down as the biggest divorce settlement in celebrity history.
A full hearing has been scheduled for October which is due to last for two days.
The former couple are expected to fight over their £158million mansion in Los Angeles and a Grade II-listed home in London’s Chelsea, worth up to £100million.
A family court hearing earlier this year was told Mr Stunt had signed a prenuptial agreement worth £16million.
Plush: The outing came as James’ bitter £5.5bn divorce from the daughter of F1 mogul Bernie Ecclestone continues
Luxury: James settled into the back of his luxury car as he relaxed
Chilling: James looked serious as his prestigious motor sped away
Hometime: James stared into the distance as he made his home
Six years ago the couple married at Odescalchi Castle in Rome in front of 350 guests and were serenaded by an array of pop stars in a glitzy £12million wedding.
They share three children Lavinia, and two-year-old twins James Jr and Andrew.
Petra has hired lawyer Baroness Fiona ‘Steel Magnolia’ Shackleton, who represented Sir Paul McCartney in his divorce battle with Heather Mills.
His assets were also said to include a wine collection worth up to £15million and two Chelsea properties worth up to £4million each.
Australian cricket legend Shane Warne was cleared over allegations he hit a porn star in the face during a night out at LouLou’s that same night.
The former spin bowler was accused of punching 30-year-old glamour model Valerie Fox inside the club.
But after being questioned under caution by police on Sunday, 48-year-old Warne was released without charge and will face no further action.
Over: Six years ago the couple married at Odescalchi Castle in Rome in front of 350 guests and were serenaded by an array of pop stars in a glitzy £12million wedding (pictured in 2011)