Elton John claims he once jived with the Queen to Bill Haley’s Rock Around The Clock at Windsor Castle.
He makes the claim on tonight’s edition The Graham Norton Show on BBC1. Queen Elizabeth would have been 55 at the time.
"Princess Margaret and I became friends,” he says. “I took her to the cinema once at the Odeon Kensington. We had a lovely time and then we went out to dinner and I took her home. Nothing happened of course.
"I also once danced with Princess Anne at Prince Andrew's 21st Birthday and the Queen came over and said, 'may I join you?'. We danced to Bill Haley's Rock Around the Clock. It was one of the most surreal moments of my life.
"Having been born in a council house in Pinner the chances of dancing with the Queen at Windsor Castle were pretty long."
66-year-old Elton also tells Norton of his delight that actor Tom Hardy had been cast to play him in a movie about his life.
"I've spent a lot of time with Tom already and we get on like a house on fire. We are very much alike - you wouldn't think so and certainly not physically. I wanted a serious actor and I'm so thrilled he is doing it," he said.
"I didn't want it to be a flippant film. It's based on fact but there is a lot of fiction in it because I don't want just the usual biopic and my life has been so surreal."
John Bishop, Judi Dench and Jeremy Paxman also appear on tonight's Graham Norton Show.