The daughter of Formula One billionaire Bernie Ecclestone, Petra (now known as Petra Stunt), is selling her Los Angeles mansion - probably the biggest private homes in the city - for £162 million.
The Manor, built by late television producer Aaron Spelling, stretches to a gigantic 56,500 square feet. Set in five acres, it is designed to look like a French chateau and has has fourteen bedroom suites (with 27 bathrooms) plus a service wing.
The master suite alone, at 7,000 square feet, is much bigger than most houses, and has its own kitchen, living room and a two-level walk-in wardrobe connected by a pair of staircases.
"The Manor is amongst the most exceptional properties in the United States. Its elegance and grandeur put the property in a category of luxury all on its own," say agents Hilton & Hyland.
"The magnificent home is perched atop approximately five acres of exquisitely landscaped land in prestigious Holmby Hills. It is the largest and grandest private residence in Los Angeles."
Petra, 27, bought the place five years ago for just £69 million in cash and has since remodelled the house to create a more contemporary feel. The enormous hall, for example, has a 30-foot ceiling, black and white striped marble floor, an elaborate double staircase and enormous chandelier.
She also had a large aquarium installed in the study, and gave the basement level a nightclub makeover.
The 100-odd rooms include a two-lane bowling alley, a wine cellar and tasting room, a catering kitchen, a gym and a spa and beauty salon with massage and tanning rooms.
Outside, there are formal gardens containing a swimming pool and tennis court, as well as a citrus orchard and koi carp pond. There's covered parking for 16 cars, as well as a circular motor court with a fountain and space to park 100 more.
Even the service wing has five staff bedrooms and two butler's suites.
But the house, agent Rick Hilton tells the Wall Street Journal, has become surplus to requirements. Petra and her husband, billionaire investor James Stunt, have two small children who go to school in London and spend most of their time at their $45 million Chelsea home.
UK's most expensive houses
UK's most expensive houses
The most expensive property on the open market in London right now isn't even a house. But this five-bedroom apartment has the prestigious One Hyde Park address, with magnificent views of both Knightsbridge and Hyde Park. Like a country house, it's split into two wings, connected by a 50-metre hallway. And the Candy & Candy decor is dramatic, to say the least. It's priced at an eye-watering £64,999,950, through Savills.
This seven-bedroom house has both indoor and outdoor swimming pools, along with a spectacular double-volume entrance hall, panelled study and grand double reception room. There are also two large dining rooms, a cinema room and a staff flat on the lower ground floor. It costs £46,500,000 through Knight Frank.
This 18th-century house has its own spa tucked away in the basement, with swimming pool, gymnasium, steam room, sauna and beauty treatment suite. The "magnificent ambassadorial mansion" has six receptions, eight bedrooms and a separate mews house. It costs £39,500,000 through Savills.
This house may look in pretty good condition to you and me, but the agents reckon it "does require updating to meet today's standards". Built in 2001, Oaklands Park has over 100 acres of land with four cottages, 33 stables and a polo pitch. There are five reception rooms and six main bedroom suites. It's for sale through Savills for £25,000,000.
Just three miles from the middle of Edinburgh, sixteenth-century Craigcrook Castle is up for sale for the first time in nearly three hundred years. It needs a fair bit of work - and a great deal more money - but has gallons of potential. It's up for sale through Ballantynes with a guide price of £6,000,000.
The most expensive property we could find in Northern Ireland right now, Dundarave is a grand mid-eighteenth-century house standing in 595 acres. The extraordinary Great Hall, which rises to the full height of the building, was based on the hall of London's Reform Club. It's on the market for £5,000,000 with Savills.
It may be a little outside the usual footballer's territory, but Swettenham Hall has room for a good kickabout in several of its half-dozen reception rooms. There's an indoor swimming pool and gym, a historic chapel - and a helicopter hangar. It's up for sale with Jackson-Stops for £12,750,000.
This bastion of bling near Exeter was built four years ago and comes with an extraordinary range of features - from equestrian facilities to a helipad and hangar. There's an indoor swimming pool, an enormous garage that's more immaculate than most kitchens, and even an indoor shooting range - as well as a cinema, bar and entertainment suite. It'll set you back £7,000,000 through agents Knight Frank.
"Steeped in history and glamour", say the agents, this Georgian country pile has nine reception rooms and 13 bedrooms. Designed by by Sir John Soane, it features a sweeping double staircase and stunning original features. There's a rumour that Johnny Depp's interested, though, so you may need to move fast to snap it up. It's priced at £5,750,000 through agent Sowerbys.
Near Droitwich, this "faux-Regency house" has nine bedroom suites and four receptions - plus a huge conservatory and an orangery. It has a well-kitted out leisure wing, with pool, gym, sauna, steam room and solarium. Set in parkland, it's approached by an impressive drive. You can snap it up for £9,500,000 through agents Andrew Grant.