Sir Elton John has confirmed he and his longtime partner David Furnish will wed on Sunday (21Dec14).

The Rocket Man hitmaker took to Instagram.com to invite followers to keep an eye out for photographs of the nuptials on the photo sharing app.

He posted a picture of the invitation, which features a backdrop of red roses and the words, "Sir Elton John and David Furnish request the pleasure of your company to celebrate their wedding on Sunday the 21st of December" emblazoned across the image.

He added the caption, "Please join us this Sunday @DavidFurnish and I will be posting special moments from our big day. #ShareTheLove #EltonJohn #DavidFurnish"

The wedding comes after legislation was passed in Britain earlier this month (Dec14) allowing same sex couples to convert their civil partnerships into marriages. John and Furnish entered into a civil partnership in 2005.