Britain's Prince William and Kate arrive in Jordan for Crown Prince Hussein's royal wedding

Jordan's highly anticipated royal wedding day got underway on Thursday with the surprise announcement that Britain's Prince William and his wife Kate had arrived to witness the nuptials of Crown Prince Hussein and his Saudi Arabian bride.

The attendance of the British royals had been kept under wraps, and was only confirmed by Jordanian state media a few hours before the start of the palace ceremony.

The wedding of Jordan's 28-year-old heir to the throne and Rajwa Al Saif emphasises continuity in an Arab state prized for its longstanding stability.

On Thursday morning, Saudi wedding guests and tourists — the men wearing white dishdasha robes and the women in brightly colored abayas — filtered through the sleek marbled lobby of the Four Seasons Hotel in Amman. Noura Al Sudairi, an aunt of the bride, said, "We are all so excited, so happy about this union,” she said. “Of course it’s a beautiful thing for our families, and for the relationship between Jordan and Saudi Arabia.”

Excitement over the nuptials — Jordan’s biggest royal event in years — has been building in the capital of Amman, where congratulatory banners of Hussein and his beaming bride adorn buses and hang over winding hillside streets. Shops had competing displays of royal regalia. Royal watchers speculated about which dress designer Al Saif would select— still an official secret.

Nancy Tirana, a 28-year-old law intern, said she spent the last week scrutinising Al Saif's every move and stitch of clothing.

“She’s just so beautiful, so elegant, and it’s clear from her body language how much she loves the queen,” she said, referring to Crown Prince Hussein's mother, Queen Rania. “I feel like all of Jordan is getting married," Tirana gushed as she ate mansaf, Jordan’s national dish of milky mutton and rice, before heading to a wedding-themed concert.

Jordan’s 11 million citizens have watched the young crown prince rise in prominence in recent years, as he increasingly joined his father, King Abdullah II, in public appearances. Hussein has graduated from Georgetown University, joined the military and gained some global recognition speaking at the UN General Assembly. His wedding, experts say, marks his next crucial rite of passage.

“It’s not just a marriage, it’s the presentation of the future king of Jordan,” said political analyst Amer Sabaileh. “The issue of the crown prince has been closed.”

The kingdom declared Thursday a public holiday so crowds of people could gather after the wedding service to wave at the couple’s motorcade of red Land Rover jeeps — a nod to the traditional procession of horse riders clad in red coats during the reign of the country’s founder, King Abdullah I. Tens of thousands of well-wishers are expected to flock to free concerts and cultural events. Huge screens have been set up nationwide for crowds to watch the occasion unfold.

The signing of the marriage contract will take place at Zahran Palace in Amman, which hasn’t seen such pomp and circumstance since 1993, when, on a similarly sunny June day, Abdullah married Rania, who was born in Kuwait to Palestinian parents. Decades earlier, Abdullah's father, the late King Hussein, sealed his vows in the same garden with his second wife, the British citizen Antoinette Gardiner.

In addition to the Prince and Princess of Wales, the guest list includes an array of foreign aristocrats and dignitaries, including senior royals from Europe and Asia, as well as First Lady Jill Biden and US climate envoy John Kerry. Other likely attendees include Saudi royals as well.

After the ceremony, the wedding party will move to Al Husseiniya Palace, a 30-minute drive away, for a reception, entertainment and a state banquet. The royals are expected to greet more than 1,700 guests at the reception.

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• MENA