Mourners around the world can watch a live stream of the Queen's funeral as Brits line the streets to pay their respects to the nation's longest reigning monarch .
The Queen's coffin will be carried on a gun carriage from Westminster Hall, where it has been lying in state, to Westminster Abbey at 10.44am.
The procession is set to arrive at 10.52am, with the service starting at 11am.
As many as 4.1 billion people are expected to tune in to watch the sombre occasion, making it the world's most watched broadcast of all time.
About 2,000 mourners, including royalty and heads of state from around the globe, are attending the service at Westminster Abbey.
The ceremony is scheduled to end at 11.55am, followed by a two-minute silence and a recital of the national anthem.
The Queen's coffin will then be transported on the gun carriage from Westminster Abbey to Wellington Arch, with thousands of mourners lining the route to pay their respects.
It will then be placed in a state hearse and travel up to Windsor, where the Queen's nearest and dearest will attend a private service.
Her Majesty will be reunited with her beloved Prince Philip as her coffin is placed next to the Duke of Edinburgh's in the royal vault of St George's Chapel.
The chamber is located 16ft down and is usually hidden by black and white diamond tiles.
It will be opened today for the Queen's oak coffin to be lowered into, but that will not be the final resting place for the Queen or her husband.
A private ceremony will be held later this evening, with senior royals set to attend as the couple – who were married for nearly 74 years before the Duke's death at the age of 99 last April – are interred in the King George VI memorial chapel.
The Queen's father George VI and her mother Elizabeth, The Queen Mother, and sister Princess Margaret are all interred in the chapel.
While royals have tended to be laid to rest in Windsor in recent times, they were traditionally buried at Westminster Abbey.
The tombs of St Edward the Confessor, Richard III, Henry V, Elizabeth I and Mary Queen of Scots are all buried within Westminster Abbey.
However, there has not been a monarch's funeral there since 1760, with the ceremonies having been held at St George’s Chapel for almost 300 years.
The UK’s longest-reigning monarch is said to have wanted to break with three centuries of tradition for her own.
She decided that her funeral should instead be held at Westminster Abbey — the first time that will have happened since King George II in the mid-18th century.
The Queen is understood to have played an active role in arranging the details of her final send-off, with planning for the state funeral starting way back in the 1960s.
The 96-year-old is said to have felt Westminster Abbey was a more suitable location for the nation’s farewell.
