It’s the start of a long weekend that will go down in history - when the Queen becomes the first British monarch to celebrate a Platinum Jubilee after 70 years of service.
And the whole country will get involved in marking the occasion, with thousands of events all across the UK as well as abroad.
While some will join the crowds in London, many others will take part in local festivities or parties, or raise a glass to her Majesty while watching the events on TV.