Queen Letizia of Spain walks arm in arm with husband King Felipe VI as they pay tribute to his uncle King Constantine in Windsor

Queen Letizia of Spain put on an elegant display as she joined her husband, King Felipe VI memorial service for the late King Constantine of Greece bee Windsor Castle on Tuesday.

The European monarch, 51, looked solemn in a navy blue knee-length dress, which she teamed with matching heels and a scarf.

The mother-of-two arrived arm in arm with her husband King Felipe, whose mother is Queen Sofia, 85, Constantine’s older sister.

Felipe himself also cut a statuesque figure in a black long coat and also added a formal gray scarf as the couple put on a united performance.

The royals had flown in from Spain for the occasion, with Letizia adding a black scarf to combat the cold British weather.

The European monarch, 51, looked solemn in a navy blue knee-length dress, which she paired with matching heels and a scarf

Once inside St. George’s Chapel, the couple sat with King Juan Carlos of Spain and Princess Benedkeek of Denmark.

King Felipe last met the British royal family when he attended the Wimbledon men’s final between Carlos Alcaraz and Novak Djokovic – and both Letizia and Felipe were guests at last year’s coronation.

The British royal family last hosted a state visit to the Spanish royal family in 2017.

Today’s service will be attended by several ruling houses of Europe.

The Prince of Wales, 41, was expected to give a reading at his late godfather’s service but pulled out at the last minute due to personal reasons.

William called the Greek royal family to apologize, while Kensington Palace confirmed the Princess of Wales is “doing well” as she continues her recovery from abdominal surgery at home.

Today’s service in St. George’s Chapel is held in honor of King Charles’ close friend and great-nephew, Constantine II, the former ruler of Greece.

Greece’s last king died on January 10 last year at the age of 82 after months of illness – more than 50 years after he was exiled in a military coup.

The late king – the only son of King Paul and Queen Frederica – was also the Duke of Edinburgh’s cousin and Prince William’s godfather.

The mother-of-two arrived arm in arm with her husband King Felipe, whose mother Queen Sofia, 85, was Constantine’s older sister

The royals had flown in from Spain for the occasion, with Letizia adding a black scarf to combat the cold British weather

The royal couple gave a very united performance on this occasion, which was attended by leading members of the royal family

The couple had come from Spain for the occasion to attend the thanksgiving service

Once inside St. George’s Chapel, the couple sat with King Juan Carlos of Spain and Princess Benedkeek of Denmark

Prince Andrew was spotted with his ex-wife Sarah Ferguson at the Thanksgiving service.

It is understood the Duke of York is attending as a member of the British Royal Family and was invited by the Greek Royal Family.

King Constantine’s funeral was attended by Princess Anne and her husband, Vice Admiral Sir Timothy Laurence, in January 2023.

Constantine became king of Greece in 1964, but was ousted from the throne when the monarchy was abolished in 1973.

King Charles is not expected to attend his memorial service in Windsor after retiring from public life following his cancer diagnosis.

Camilla’s role in the agency will see her take charge again as she tries to take the pressure off her husband.

Members of the royal family have rallied behind the king, with Prince William returning to his duties after spending time caring for his wife, Princess Kate.

The couple made solemn figures as the thanksgiving service began

In front of the Spanish royal family sat Princess Maria-Olympia of Greece, Prince Achilleas of Greece, Carlos Morales and Princess Tatiana of Greece (photo from left to right)

Due to a separate health crisis, the Princess of Wales was admitted to the London Clinic for a planned abdominal operation, and will be unable to fulfill royal duties until at least Easter.

Last month, Greece’s royal family put on a somber display as they attended a memorial service to mark one year since the death of King Constantine.

He died “of a stroke”, local media reported, after several hospital admissions in the previous months.

High-profile royals including Constantine’s son Crown Prince Pavlos and Dowager Queen Anne Marie attended a private ceremony at the former summer palace of Tatoi, just outside Athens.