The Duke and Duchess of Cambridge and Prince Harry were among the large crowds cheering on the world's top cyclists as the Tour de France began in Yorkshire.
Two million people are expected to line the roads this weekend as the county hosts the first two stages of the prestigious bike race.
Some 198 riders in 22 teams were in the middle of Leeds for the start - but the teams did not compete for the first eight miles.
The race proper began in the grounds of 18th century stately home Harewood House where the royals chatted with lead riders, including reigning British champion Chris Froome and Mark Cavendish.
There was a display by the world-famous Red Arrows RAF aerobatic team and Kate cut the ribbon to officially start the race.
The cyclists were then sent on their way in the "Grand Depart".
Scores of towns and villages along the 190km opening stage were packed as the peloton travelled through the Yorkshire Dales to the finish in Harrogate.
Organisers of the 101st Tour hope the Duchess will present the coveted yellow jersey to the stage winner this afternoon, with British sprinter Mark Cavendish tipped as the possible recipient in his mother's home town.
