Prince Harry and Meghan will today party with the stars as their matchmaker and friend Misha Nonoo marries her oil tycoon boyfriend on the terrace of a £20,000-a-day 17th century Roman villa at sunset this evening.
The Duke and Duchess of Sussex are in the Italian capital without baby Archie to attend the lavish and star-studded three-day wedding of Misha, 31, and Mikey Hess, 33, whose financier family is worth $1.9billion (£1.5bn).
Tonight the couple will walk down the aisle as the sun goes down at Villa Aurelia, a baroque villa and vineyard once owned Pope Paolo III that sits on one of Rome's seven hills and enjoys extraordinary panoramic views of the Eternal City.
Today truck after truck of supplies lined the winding roads outside the exclusive hilltop mansion, with security brought in by the couple to stop the public seeing in when the couple marry at around 6pm local time.
Around 200 guests wearing black tie or gowns will attend the grand property in the west of Roman property close to the Vatican, which has a giant terrace, ball room and dining room served with Michelin-star quality food from its kitchen.
On the first day of their three-day wedding party the couple's friends Orlando Bloom, Katy Perry, Karlie Kloss and Joshua Kushner were spotted at a glittering rehearsal dinner at upmarket Rome restaurant Pierluigi on Thursday night, but Harry, 35, and Markle, 38, stayed away.
Harry's cousins Princess Eugenie and Princess Beatrice also missed the rehearsal but are expected to attend today's wedding.
The party will stretch into a third day on Saturday with another expensive event at the celebrated Cinecittà film studios, where it was initially reported the wedding itself would take place.
More than 3,000 movies have been filmed there including 47 Oscar winning ones such as La Dolce Vita. It has been so loved by directors including Fellini, Scorcese and Ford Coppola it has earned the nickname 'Hollywood on the Tiber.'
Misha Nonoo will marry at the expensive and exclusive Villa Aurelia in Rome (pictured) in front of her closest friends including Harry and Meghan, who have left Archie at home
Misha Nonoo will marry her oil tycoon boyfriend here at sunset tonight here at a star-studded two-day extravaganza attended by 200 VIPs with the venue costing an estimated £20,000 just to rent
The Duchess of Sussex's designer friend Misha Nonoo is set to tie the knot at a stunning 17th Century Villa Aurelia in Rome tonight - and preparations are already underway at the wedding venue. Pictured, the entrance to the villa this morning
Supplier trucks were this morning seen lining the winding roads outside the exclusive hilltop Villa Aurelia, pictured, where Misha, 31, is set to marry American financier Mikey Hess, son of an oil tycoon, at sunset
Police tape blocks the entrance to the exclusive hilltop villa where Misha Nonoo's wedding will take place this evening. The Duke and Duchess of Sussex will be among the guests. It is thought the couple will marry outside at sunset
Misha Nonoo, who is rumoured to have set up the Duke and Duchess of Sussex, will marry financier Mikey Hess. Pictured, the couple dressed in their finery for the wedding of the Duke and Duchess of Sussex in May last year
The Duchess of Sussex (right) hugs designer Misha Nonoo at the launch the Smart Works capsule collection at John Lewis in Oxford Street, London. Misha is marrying oil tycoon Mikey Hess in the Eternal City
Prince Harry and Meghan are said to have travelled to Italy - on what is their ninth plane journey in just over six weeks - without baby Archie Mountbatten-Windsor.
The pair are thought to be enjoying some downtime at the nuptials at Cinecittà film studios tomorrow before they begin their royal tour to South Africa on Monday.
Harry and Meghan were spotted arriving in Rome today, but Buckingham Palace refused to confirm whether they flew by a commercial or private jet.
However, a source told The Sun: 'They did fly commercial as Meghan was a bit stung by the criticism over her and Harry's use of private jets.'
The Sussexes attracted scorn last month for catching four private flights in 11 days to Ibiza and Nice, despite their vociferous campaigning on environmental issues.
The Pierluigi dinner, Rome's top fish restaurant, kicked off a weekend of celebrations to mark the wedding of multi-millionaire Mikey and Misha, who is rumoured to have introduced the Duke and Duchess of Sussex.
The Duchess of Sussex recently reunited with longtime friend Nonoo at the launch of her Smart Set charity clothing collection, in which the designer is a partner.
The pair have both spoken publicly about their close relationship so it is of little surprise Meghan has made the trip to Italy for her friend's big day.
It has been confirmed by sources that Meghan and Harry have flown in for the occasion but forgo a private jet following the furore surrounding their extensive travel this summer.
A source told The Sun: 'They did fly commercial as Meghan was a bit stung by the criticism over her and Harry's use of private jets.'
Royal correspondent Emily Andrews tweeted yesterday that the Sussexes are enjoying some downtime ahead of their busy 10-day royal tour of Africa, which starts on Monday.
MailOnline contacted Buckingham Palace, with a spokesperson saying that they wouldn't provide 'comment on Their Royal Highnesses's private schedule'.
The weekend kicked off last night with a relaxed dinner, with guests sitting outside and visible from the street.
Spirits were high as Katy Perry (left) and Orlando Bloom (far right) laughed with friends as they joined a host of A-list stars enjoying a late-night dinner ahead of the wedding of Misha Nonoo and Mikey Hess in Italy
Karlie Kloss and Joshua Kushner were also in attendance and took time out from the festivities