A former waiter will be on the same bill as Elton this summer.
As previously announced, the Rocket Man is playing the Magic Summer Live festival at Hatfield House in July, along with Rumer and the Lighthouse Family.
The Overtones, are currently enjoying chart success with their album Good Ol'Fashioned Love, are also to perform.
One of its members used to be a waiter at some of the singer's parties.
Lachie Chapman told the Evening Standard: "I used to serve Elton John's table when I worked in a restaurant, which he booked out for his Christmas party two years in a row!
"He was always really lovely and now we are sharing a stage with him. It's mind-blowing."