World leaders are at the funeral of Queen Elizabeth II.
On the way to the abbey, King Charles III will lead a sombre procession behind his mother's body.
The bell at the abbey is tolling once a minute before the service starts.
It is the end of 10 days of events in the UK.
A group of world leaders, including the US President, the French President and the Canadian Prime Minister, have arrived at the abbey.
The coffin of the Queen will be taken through Parliament Square in the first of three processions.
The Prince of Wales and the Duke of Sussex will once more walk side by side behind their father, the King.
Princes George and Charlotte will walk behind the Queen's coffin.
The members of the Royal Family are getting ready to leave for the funeral.
State Gun Carriage will carry the coffin in the procession. A band from the Royal Marines will accompany a guard of honor in the square.
500 people will attend the state funeral of the Queen, including presidents, prime ministers and foreign royals.
The Emperor and Empress of Japan, as well as members of other European royal families, will be included.
The former prime ministers entered the historic abbey ahead of the ceremony.
Sir Keir Starmer is the leader of the Labour Party.
The people who were honoured in the Queen's birthday honours were invited.
When Natalie was asked to attend, she said she was completely speechless.
Barbara Crellin said she cried when she was invited and described herself as "privileged to be here".
As London prepares for as many as one million visitors for the historic occasion, roads and bridges are closed to traffic.
London's City Hall said that all public viewing areas are full.
Most of the country will be watching the funeral and most offices will be closed for a bank holiday.
Millions of people are expected to watch the event, which will see the Queen become the head of state for 14 of the Commonwealth.
Big screens have been put up in cities across the country for people who aren't invited.
After four and a half days of waiting, the last people to pay their respects at the Queen's lying-in-state paid their respects just after 6:30.
This is the first state funeral in 50 years.
The service will be conducted by David Hoyle and the sermon will be given by the archbishop.
Traditional church music and readings from the Bible are included in the order of service.
The Last Post will be played before the national anthem is sung.
The coffin will be taken to the sombre toll of Big Ben following the service.
People can view the procession from designated viewing areas along the route, and gun salutes will also be fired from Hyde Park.
After arriving at Wellington Arch, the coffin will be taken to the new State Hearse, where it will be sent to Windsor Castle. The Queen's committal service will take place in St George's Chapel.
The committal service will be conducted by the Dean of Windsor and will be attended by a small group of people.
The Queen and the Duke of Edinburgh will be laid to rest at the King George VI memorial chapel.