David Cameron has said the two gold medals claimed by Team GB would "put rocket boosters" on the Olympics.
The Prime Minister praised Britain's gold medallists - and he hinted he wished for the athletes to triumph as he visited the UK's "luckiest" spot.
Mr Cameron was speaking after Bradley Wiggins won gold in the cycling time trial with Chris Froome claiming bronze. Earlier, rowers Helen Glover and Heather Stanning took Team GB's first gold medal of London 2012, making history by becoming the first British women to take the top spot in Olympic rowing.
Mr Cameron said: "It is a golden moment for Britain, I think it's going to give a huge confidence boost to the whole country. It's already a great Olympics, already a great start, but this is really going to put rocket boosters on it for the whole country and I'm very, very excited."
Speaking to Channel 4 News, the Prime Minister hailed Wiggins' "professionalism, personal courage and physical achievement", but joked he was "not really capable" of growing Wiggins-style sideburns in tribute to the cyclist.
Mr Cameron also hinted he made a wish for Team GB to win gold medals when he visited the Giant's Causeway in Northern Ireland earlier today before flying to London.
"I've just got back from what's meant to be the luckiest place in the United Kingdom. As I sat at the sea for about a minute I made a little wish," he told the Global Health Policy Summit at the capital's Guildhall. As I switched on my phone after departing we had won the first of today's two gold medals."
Scottish swimmer Michael Jamieson later brought further medal glory for Great Britain when he won silver in the 200m breaststroke final. Spectators in the Aquatics Centre roared as the 23-year-old, from Glasgow, came in second after Hungarian swimmer Daniel Gyurta, who broke the world record.