Saturday’s event may be steeped in pomp and pageantry, but it carries deeper meaning for the British monarchy.

Senior working royals including Prince William, Kate Middleton, Princess Anne, Prince Edward and Queen Camilla will reportedly take part in the king's birthday parade.

Ahead of Saturday's festivities, King Charles III also honored a handful of celebrities and public figures, including David Beckham, Gary Oldman and Elaine Paige.

The king, queen and other senior royals are celebrating the monarch’s official birthday with the Trooping of the Color in London, while his actual birthday is in November.

As per the British Army website, the ceremony of Trooping the Colour is thought to have first taken place during the reign of King Charles II in the 17th century. In 1748 it was decided that it would be used to mark the Sovereign’s official birthday.

BRITISH pubs could rake in a massive £32 million if Trooping the Colour was designated a bank holiday, beer bosses believe. The British Beer and Pub Association say an extra 6.5 million pints

Britain's King Charles and Queen Camilla ride a carriage as part of the Trooping the Colour parade which honours King Charles on his official birthday, in London, Britain,. REUTERS/Isabel Infantes LONDON (Reuters) -Britain's King Charles and other senior royals wore black armbands at the "Trooping the Colour" military parade on Saturday as a mark of respect for the victims of the Air India plane crash.

The King’s official birthday was marked with a carriage procession to Horse Guards Parade featuring his family