It was a Monarch’s Jubilee Pageant fit for a Queen!
Prince William and Harry, along with Kate Middleton, floated down the Thames River on the Spirit of Chartwell royal barge.
They accompanied Queen Elizabeth II for another Diamond Jubilee Celebratory event.
It was an extremely special occasion for the Queen who is celebrating 60 years on the throne.
You could say it looked as if everyone was having a royal good time!