For the first time ever, the world famous cycling race the Tour de France is starting off in London.
The capital city is expecting a million visitors to watch a preview stage on Saturday and the start on Sunday.
From London, the cyclists move to Canterbury in Kent then cross to Belgium then France, with the race ending in Paris on 29 July.
The 3,570km route features 20 parts, with six days in the mountains, including three mountain-top finishes.
Australian cyclist Robbie McEwen won the stage, finishing at the front of a bunch sprint after 203km of racing from Greenwich to Canterbury.
The event is watched by as many as 15 million people on the roadside every year with an estimated two billion watching on television over the three weeks.
This is the 94th year for the famous race, which was won by American Lance Armstrong for seven years in a row from 1999 to 2005.