On the short journey from Clarence House, the King, 74, looked solemn and thoughtful at times, in what is undoubtedly the biggest day of his life.
More than 100million people around the world are about to watch the historic first coronation of a British monarch in 70 years – with an estimated 2million people on the streets of London to watch history unfold.
The monarch had been heir since the age of three, and is now ready to officially become the King.
VIP guests queued for a mile from 6am to get one of the prime 2,300 seats inside. The Abbey was full at just before 9am.
Stars seen inside the church are Katy Perry, Lionel Richie, Sir Andrew Lloyd Webber, Stephen Fry, Nick Cave, and magician Dynamo, as well as Dame Emma Thompson and many others.
They will watch Charles be crowned in a Christian ceremony that dates back for 1,000 years on a day dripping with glorious displays of pageantry.
Guests of the King started arriving at the Abbey from 7am, Â four hours before the ceremony. About 100 heads of state are in London, with representatives from 203 countries due to attend.
