One user wrote on X: “I love Queen Camilla’s pink outfit.”

Another person said: “It’s absolutely stunning!”

A third commented: “No one can wear a hat quite like Camilla.”

While a fourth one chimed: “Her Majesty looks especially beautiful in this pink outfit with her charming pearls!”

The Commonwealth’s “powerful influence for good in the world” was celebrated by the royal family during a service featuring a 2,000-strong congregation drawn from across the family of nations.

The royals were joined by Prime Minister Sir Keir Starmer and other senior Government figures.

King Charles’s appearance at the service was his first in two years after his cancer diagnosis last year forced him to postpone public-facing duties for a period and Princess Kate was also absent last year after beginning her chemotherapy, which she has since completed and is now in remission.

This year’s Commonwealth Day theme is Together We Thrive, which celebrates the “enduring spirit of the Commonwealth family”.

The King and Queen led the way, as the royals processed to their seats, followed by the Prince and Princess of Wales then Princess Anne and the Duke and Duchess of Gloucester.