Diamond Jubilee river pageant spectators have shrugged off the cold, damp and wet conditions that have shrouded London.
The gloomy weather is in contrast to the recent heatwave but the river banks in central London are already filling up with crowds.
Organisers remain upbeat despite rain and drizzle being forecast for most of the day, with Pageant Master Adrian Evans declaring preparations were in hand.
Mr Evans said: "There is some rain around, but it has not dampened any spirits.
"We in Britain are experts at not letting the weather spoil our fun. The London Philharmonic Orchestra will be playing Singing In The Rain as they travel down the river, and the crowd can sing along with them.
"We are all set to have one of the most spectacular pieces of river theatre that London, and the world, has ever seen. Excitement is building, and everything is ready."
The water-borne extravaganza will be one of the highlights of the four-day Diamond Jubilee weekend with organisers hoping to recreate scenes not seen since the reign of Charles II.
With the Queen and Duke of Edinburgh onboard the lavishly decorated royal barge will be the Prince of Wales, the pageant's patron, the Duchess of Cornwall, the Duke and Duchess of Cambridge and Prince Harry.
Every conceivable vessel will be afloat on the Thames from kayaks, skiffs, Dunkirk little ships and dragon boats to tugs, barges, rowed shallops and passenger vessels.
At its head will be a floating belfry with each bell named after a senior member of the Royal Family.
People have been gathering along the seven-mile course of the river pageant since first thing, with a few hardy souls sleeping overnight to get a good spot.
Many of those were wrapped up against the cold weather but looking forward to the spectacle.