Huge crowds are gathering in central London ahead of the Coronation of King Charles III and Camilla, the Queen Consort on Saturday.
Lavish displays of royal pageantry are expected, with processions planned either side of the service at Westminster Abbey.
Some 5,000 members of the armed forces are arriving by train at London Waterloo station.
The ceremony itself will be led by the Archbishop of Canterbury at 11:00 BST (10:00 GMT) and attended by the Royal Family as well as world leaders and dignitaries.
A weekend of planned special events also includes street parties and a concert at Windsor Castle tomorrow, as well as a nationwide volunteering drive on Monday.
Anti-monarchy protests are also expected, spearheaded by the group Republic - which is coordinating rallies in Trafalgar Square and around the UK.
Prince Charles became king of the United Kingdom and 14 other realms in September, when his mother Elizabeth died after 70 years on the throne.
Months of intense planning have gone into the coronation celebrations - the 40th to take place at Westminster Abbey since 1066.
Bd-pratidin English/Golam Rosul
