Women's rowing pair Helen Glover and Heather Stanning have won Team GB's first gold medal of the London Olympics.
The duo also became the first British women to take an Olympic rowing gold in front of an ecstatic crowd at Eton Dorney.
They led from the front in a dominant performance which saw the opposition trail in their wake.
The favourites crossed the line in 7 minutes, 27.13 seconds. Australia took silver, a length back, with New Zealand earning the bronze.
After finishing Glover and Stanning hugged each other with joy and then saluted the crowd, which included Princes William and Harry and the Princess Royal.
"I was so shattered," Stanning told the BBC. "I'm just so overjoyed - I'm talking rubbish now as well."
Glover appeared to smile as the pair approached the finish line. "It was probably a grimace," she said. "I don't remember smiling because I never remember thinking we've got this."
Stanning, a captain in the British army, and Glover, a former physical education teacher, are unbeaten in 2012 and set an Olympic-best time in the heats.
They were never threatened during the race. They were 3.42 seconds ahead after 1,000 meters, and more then five seconds ahead of New Zealand at the 1,500-meter marker.
As they raced along the packed the grandstands in the final 300 meters, they visibly tired but were too far ahead to be caught.
Britain has waited until the fifth day of the Olympics to celebrate its first gold after cyclists Mark Cavendish and Lizzie Armitstead (both cyclists) and the diving pair Tom Daley and Peter Waterfield all failed to top the podium.
There are high hopes of more gold later today when Tour de France winner Bradley Wiggins competes in the men's road cycling time trial.
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