Loads of events are happening as the country marks the 50 years that the Queen has ruled.
The English tourist council reckons as many as a third of all the people in Britain will celebrate the Jubilee in some way this weekend.
In Stevenage, which is nowhere near the sea, people are trying to build a beach, while in Reigate some shops are selling things at the same price they were in 1952 - when the Queen took the throne.
Two of the biggest events are massive concerts at Buckingham Palace, one with loads of top pop stars and another featuring all the best classical music.
The events continue all through the weekend and also on Monday and Tuesday, which are both bank holidays.