Giant Olympic rings became the crowning glory on Tower Bridge today as the countdown to the London 2012 Games enters the last 30 days.
London 2012 chairman Lord Coe and mayor Boris Johnson were among the VIPs who watched as the rings - 82 feet (25 m) wide and 38 feet (11.5 m) tall - were lowered into place on the central London landmark on the River Thames.
The rings, which weigh three tonnes, cost £259,817 to produce and installing them is estimated to have cost £53,000.
A light show, complete with beams of changing colours and intensity, is set to bring the rings to life tonight.
Describing the sight as "glorious Tower Bridge", Mr Johnson said the landmark was the perfect choice to showcase what London has to offer this summer.
He said: "The rings are a wake up call for London, that we've got 30 days to go."
He added: "We're confident we're as ready as any Olympic city has been at this stage."