The Queen is expected to appear on the Buckingham Palace balcony after the royal standard was raised above the residence.
The flag went up at around 4.31pm, meaning the Queen has arrived at the Palace from Windsor Castle.
She has not been seen in public since Thursday, the first day of the celebrations.
The Queen on the Buckingham Palace balcony earlier this weekend
Aaron Chown
While Her Majesty didn't attend the pageant, a hologram of her was shown to those in attedance
Aaron Chown
There were some doubts whether Her Majesty would make another appearance during the Jubilee weekend.
But fans still came out in their droves to celebrate Her Majesty's 70 years of reign during the Platinum pageant near Buckingham Palace.
The ambitious £15 million event was split into four acts: For Queen and Country with a military parade; The Time of Our Lives progressing through seven decades of culture, music and fashion; Let’s Celebrate telling the story of the Queen’s life in 12 chapters with corgi puppets and carnival creations; and the Happy and Glorious musical spectacle.
Guardsmen, Gurkhas, Royal Marines and the Household Cavalry Mounted Regiment in their breastplates and plumed feathers were among the hundreds of servicemen and women who led the way marching along the streets around Buckingham Palace.
In the early stages of the event, the Gold State Coach, a carriage used for coronations and Jubilees paraded around the streets surrounding the palace.
Within the carriage, which hasn't been seen since 2002, was a projected hologram of her Majesty on her coronation day.