Though once generally considered a fashion faux pas, celebrities re-wearing a designer outfit to major events has become something of a new trend thanks to Kate Middleton, the wife of the U.K.'s Prince William, heir to the British monarchy, and collectively known as the Duke and Duchess of Cambridge.

It would appear that first lady Jill Biden has taken inspiration from future-Queen Kate, as Biden re-wore a designer dress to the royal wedding of Jordan's crown prince on Thursday that she first wore for a State Dinner at the White House less than two months ago, according to the "mom-life" website SheKnows.

While it is unclear if Middleton's motivation for re-wearing designer fashions to big events is driven by frugality and practicality or resource sustainability concerns, the outlet noted that she has nonetheless inspired a growing number of celebrities to adopt the trend.

Re-wearing the same outfit

Town & Country magazine reported that first lady Jill Biden, joined by daughter Ashley, was in attendance among the many high-profile guests in Amman, Jordan on Thursday for the royal wedding between Jordanian Crown Prince Hussein, the son of King Abdullah II and Queen Rania, and Saudi architect Rajwa Al Seif.

The outlet noted that Biden was wearing a light purple or mauve designer gown from Reem Acra with matching heels -- the exact same outfit she wore for an opulent White House State Dinner event on April 26 in honor of the president and first lady of South Korea.

Town & Country further reported that the Bidens and the Jordanian Royal Family have been friends for many years, with the president and king having met officially at least three times since 2021, though the two men also met unofficially numerous times during Biden's vice presidency when the king would often travel to Washington D.C. to visit with the crown prince while he was a student at Georgetown University.

High-profile guest list for the royal wedding

As for the prestigious guest list for the Jordanian royal wedding on Thursday, United Arab Emirates-based media outlet The National News reported that it was packed with royal couples and top elected officials from the surrounding region and around the globe.

That includes representatives of the royal families of Middle Eastern nations like Bahrain, Kuwait, Oman, Qatar, and the UAE, along with the elected presidents of Iraq and the semi-autonomous Kurdish region that both share a border with Jordan.

Also in attendance were British royals Prince William and Kate as well as Princess Beatrice and husband Edoardo Mapelli Mozzi, along with representatives of the royal families of European nations like the Netherlands, Norway, and Sweden, and even from Asian nations like Japan.

Wedding attendance part of a broader regional trip

The Hill reported that first lady Jill Biden's attendance at the Jordanian royal wedding was part of a broader six-day international trip with stops in the Middle East, North Africa, and Europe.

Starting with the visit to Jordan, Biden will also travel to Egypt, Morocco, and Portugal before returning home to the U.S.

Before her Wednesday departure, the first lady tweeted, "I’m on my way to the Middle East and North Africa to build on our longstanding partnerships and meet with young people across the region to discuss how the next generation can thrive."

With regard to the royal nuptials, she added, "I look forward to traveling to Amman, Jordan to join King Abdullah and Queen Rania in celebrating their son, Crown Prince Al Hussein's wedding to Ms. Rajwa Al Seif."

President Joe Biden did not make plans to also attend the royal wedding in Jordan, despite his purported close friendship with King Abdullah II, due to his scheduled participation in the Air Force Academy graduation ceremony on the same day, where he went viral for falling awkwardly on stage after tripping over a sandbag holding his teleprompter in place, according to the Associated Press.