Joe Biden has arrived at Westminster Abbey joining the 2,000 guests expected to fill the venue for the state funeral of the Queen.
The US President entered the doors of the Abbey wearing a black suit and tie alongside his wife Jill.
They held hands as they walked through the famous church and took their seats, 14 rows back, to pay their respects to Queen Elizabeth II.
Westminster Abbey began filling up from 8am on Monday as the congregation arrived up to three hours early.
Biden and First Lady Jill travelled in his motorcade, known as "The Beast", with five other security vehicles.
He is among world leaders paying their respects to the late monarch alongside French President Emanuel Macron and New Zealand Prime Minister Jacinda Ardern.
Many heads of state arrived in a fleet of buses while Biden was allowed to travel in The Beast.
Commentators speculated that the US leader might as well have joined on the bus after videos showed his vehicle moving slowly through the streets of London.
Enormous crowds of mourners have turned out to honour the Queen along the procession route through London.
The British public have travelled across the country to pay their respects to the late monarch, with tens of thousands more flocking to Windsor where she will be buried on Monday.
The Royal Family have also arrived for the funeral at Westminster Abbey.
King Charles and Prince William left the car together dressed in military uniform while Prince Harry and Meghan were dressed in black.
The largest security operation the UK has ever seen has swung into action, with with police and army descending on London's capital.
It comes as the nation's 10 days of mourning culminates in the Queen's funeral, which gets underway from 11am.
The new Prince of Wales and his wife Kate Middleton are at the Abbey with their children Prince George and Princess Charlotte.
Biden was seated in an aisle seat on the south transept of Westminster Abbey, behind Polish leader Andrzej Duda.
He is directly in front of Petr Fiala, the prime minister of the Czech Republic, in an area of the church reserved for world leaders.
The First Lady was seated next to Swiss President Ignazio Cassis during the hour-long service.
On Sunday night, Biden and his wife were previously greeted by the Prince and Princess of Wales alongside King Charles and Camilla Queen Consort during a reception at Buckingham Palace.
