King Charles III has taken the Coronation oath as part of a service at Westminster Abbey.
According to the BBC, he promises to uphold the law during his reign.
He added that he will “foster an environment in which people of all faiths may live freely”.
Around 2,200 people, including the Royal Family, celebrities, faith leaders and heads of state, are in attendance.
Thousands of people watched as a lavish procession made its way to the Abbey from Buckingham Palace.
After the service, there will be a second, larger procession before a royal appearance on the Palace balcony
Earlier, leading members of Republic, the anti-monarchy group were among half a dozen people arrested near Trafalgar Square.