LOCOG via Getty Images
Torchbearer Akosua Scantlebury holds the Olympic flame on the Royal barge Gloriana as it makes it way down the River Thames towards Richmond Bridge on July 27, 2012 in London, England.
Oli Scarff / Getty Images
Crowds enter the water to watch the Queen's rowbarge Gloriana carry the Olympic flame along the river Thames from Hampton Court to City Hall on July 27, 2012 in London.
Ben Birchall / LOCOG via AP
The royal barge Gloriana carries the Olympic flame burning in a cauldron as it makes its way down the River Thames towards Richmond Bridge during the final day of the Olympic torch relay in London, July 27, 2012.
Emilio Morenatti / AP
People run from one side of Westminster bridge to the other to watch the royal barge carry the Olympic flame along the river Thames on July 27, 2012.
Paul Hackett / Reuters
Olympic torch bearer Amber Charles holds the Olympic flame on a floating pontoon in front of Tower Bridge in London on July 27, 2012, at the end of the torch's river journey.
Justin Tallis / AFP - Getty Images
Torch bearers laugh on board the Gloriana as it navigates away from a set of giant Olympic rings mounted on a barge floating on the River Thames on July 27, 2012.
The Olympic torch is set to makes its grand entrance at tonight's opening ceremony celebration after a 70-day journey and racking up about 8,000 miles throughout its tour. NBC's Michelle Kosinski reports.
The Olympic flame is making its way down the River Thames on the final day of its journey around the United Kingdom before arriving in the Olympic Stadium tonight for the Games' opening ceremony. See more pictures of the torch relay in our slideshow:
Lit by the sun's rays in Greece, the Olympic torch takes a 70-day, 8,000 mile trip to London for the 2012 summer games.