SIR Elton John and his partner David Furnish have formally converted their civil partnership to a marriage — with the musician documenting the day on the Instagram website.

    The couple have been hosting a ceremony at their Windsor estate in Berkshire with a number of stars in attendance during the weekend.

    David and Victoria Beckham, musician Ed Sheeran and actor David Walliams were among the guests.

    Furnish and John, who have two sons, became civil partners in 2005.

    The couple’s sons Zachary, who was born in 2010, and Elijah, born last year, attended the ceremony.

    John has posted a number of pictures to the photo-sharing website, where he has thousands of followers, including a picture taken at a window showing a garden, with the caption: “Good morning! Nice day for a wedding.”

    In March, the law was changed in England and Wales to allow same-sex marriage. John said at the time he was “very proud” of Britain for changing the law.

    Guests also included singer Lulu, Burberry chief executive Christopher Bailey, as well as comedian Jimmy Carr.(SD-Agencies)