Minutes before the beginning of King Charles III's coronation ceremony, UK Prime Minister Rishi Sunak called it a moment of "extraordinary national pride".
Mr Sunak, who along with his wife Akshata Murty will be at the head of a procession of flag-bearers as the UK's flag is carried by a high-ranking Royal Air Force (RAF) cadet, in an Instagram post said the event is not just a spectacle, but a "proud expression of our history, culture, and traditions".
"Today's Coronation is a moment of extraordinary national pride.
No other country could put on such a dazzling display.
But it is not just a spectacle.
It's a proud expression of our history, culture, and traditions.
It is a vivid demonstration of the modern character of our country.
And a cherished ritual through which a new era is born.
God Save The King!" he posted from his Instagram profile.
Rishi Sunak, a practising Hindu, will also make history by giving a reading from the Bible as the head of the UK government.
King Charles III's coronation - the first of a British king since 1937 - is the religious confirmation of his accession after the death of his mother, Queen Elizabeth II, last September.