Jessica Ennis and Mo Farah - Britain's best-loved athletes - both claimed golds tonight in an Olympic Stadium that was a boiling cauldron of emotion.
First Jessica Ennis realised her Olympic dream taking gold in the heptathlon and then Mo Farah stormed to victory in the 10,000 metres in the race of his life.
His performance capped an incredible 'Super Saturday' for the British team which claimed six gold medals - three of them in the 80,000-capacity Stadium to unprecedented scenes of delirious joy.
There was a bonus gold as Greg Rutherford unexpectedly leapt to the Olympic title in the long jump.
Earlier Team GB won two rowing golds and yet another in the velodrome as the women in the team pursuit claimed victory with another world record.
When Ennis's moment of triumph came the audience were ecstatic and she sat on the track and wept. She then broke into a huge smile, acknowledged the adoring crowd and wrapped herself in a huge Union flag marked "Olympic Champion".
Interviewed by the BBC, she burst into tears and said: "I am so shocked, I can't believe it. I am so happy."
Farah hugged his stepdaughter Rihanna and wife, Tania, who is pregnant with twins, as he draped himself in the Union flag.
Talking to the BBC he said: "This is the best moment of my life."
The Somali-born athlete, who attended Feltham Community College and Isleworth and Syon School in London, danced for joy around the track.
Rutherford, from Milton Keynes, said: "That is the most amazing feeling in the world."
Away from the Stadium a sensational world record-breaking performance by women cyclists in the team pursuit, in the frenzied atmosphere of the velodrome, led to another gold.
The team of Dani King, Laura Trott and Joanna Rowsell led from the start to beat the US in a world record time of 3:14.051.
Jubilant Trott said: "It has been my dream since I was eight - and we have just gone and done it."
The trio, aged 23 or under, were presented with their medals before a spontaneous rendition of Hey Jude led by an onlooking Sir Paul McCartney.
Trott said: "It's unbelievable. We didn't expect a Beatle to be here. It's not often you can say you've waved at and blown a kiss at a Beatle."
Earlier, at Eton Dorney, an ecstatic crowd cheered the men's coxless four of Andrew Triggs Hodge, Pete Reed, Tom James and Alex Gregory to a victory, which extended Britain's dominance in the event to 16 years.
And just minutes later Kat Copeland and Sophie Hosking hugged each other, almost in disbelief, as they claimed gold in the lightweight event.
Today's wins propelled the British team into third position in the medal table with 29 - 14 gold, seven silver and eight bronze.
And British sports fans have another titanic day to look forward to tomorrow, with Andy Murray featuring in two tennis finals: against old rival Roger Federer in the singles and then with Laura Robson in the mixed doubles.
In Team GB's first victory of the day the coxless four crew was cheered on by Lieutenant Reed's fellow sailors and Royal Marines, who are on HMS Bulwark providing Games security in Weymouth.
Reed said: "The hours we do, the pain - it was all worth it in the end."
A bewildered Copeland said: "I can't believe this is real - that we just won the Olympics."
The rowing haul of four gold medals, two silvers and three bronze confirms London 2012 as Britain's most successful Olympic regatta ever, surpassing the eight medals, including four golds, won at London 1908.