Jessica Ennis and Mo Farah - Britain's best-loved athletes - both claimed golds 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. And 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.
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.
Saturday's wins propelled the British team into third position in the medal table with 29 - 14 gold, seven silver and eight bronze.