In the early hours of this morning, service personnel from all of the armed forces and members of the Household Cavalry Mounted Division practiced the route. It will see Her Majesty and the Duke of Edinburgh riding in the 1902 state landau carriage, which carried the Duke and Duchess of Cambridge on their wedding day.
It will see the Royal Couple travelling from a special service at St Paul’s Cathedral, before travelling down the Mall and appearing on the balcony of Buckingham Palace on Tuesday.
Major Andrew Chatburn of the household division said it all looked “spectacular”.
He said, "I'm looking down the Mall now from Admiralty Arch, with the flag and the streets lined - and the mounted band has just gone down there."
Meanwhile the captains of over 1,000 ships taking part in a huge flotilla on Sunday are set to be briefed by organisers later.
The Woodland Trust meanwhile has this morning revealed the location of 60 large new woodland areas, there to celebrate each year that The Queen has sat on the throne.
Monday night will see a huge concert organised by Take That’s Gary Barlow taking place around the Queen Victoria memorial in the Mall, with the likes of Sir Paul McCartney, Elton John, Tom Jones and Shirley Bassey all performing in tribute to The Queen.