Mo Farah has become the third British athlete to realise their dreams in the Olympic Stadium on "Super Saturday", taking gold in the 10,000 metres.
His victory, which came after a strong 53-second sprint lap, was the last of six golds for Britain on the most successful day for Team GB at an Olympics since 1908.
Mo said it was the best moment of his life when his wife Tania and daughter Rihanna rushed out to join him on the track after his triumph.
Farah said: "Seeing them on the track was the best moment of my life - having your family there with you at such a moment.
"Rihanna's shoes kept coming off so I took them off so she could come on a lap of honour but she got scared because the crowd were so loud!"
As if the capacity 80,000 crowd cheering him on during the race was not motivation enough, Mo was inspired by watching Jessica Ennis' triumph in the heptathlon moments before.
"I saw Jess with a flag and knew she must have won gold and I just felt I had to win," Farah said.
His wife said afterwards: "I just didn't speak at all throughout the race. I was watching it, but from behind my hands. But the last lap was just thrilling.
"For him it's the ultimate achievement. He was speechless when I went up to him on the track," she added.
Rihanna echoed her mother, saying: "I think it was really good. I just can't believe it. He's Olympic champion!"