Elton John has legally married his partner David Furnish, on the ninth anniversary of their civil partnership in 2005..

The 'Rocket Man' singer officially tied the knot with with his partner at their estate in Windsor in south east England this afternoon (21.12.14), on the ninth anniversary of their civil partnership.

Elton John has legally married his partner David Furnish, on the ninth anniversary of their civil partnership in 2005.

The couple - who met in 1993 - shared their special day on Twitter and Instagram, with Elton joining the image-sharing social network especially for the occasion.

Alongside an image of the couple signing the legal forms, Elton wrote: "That's the legal bit done. Now on to the ceremony! #ShareTheLove @DavidFurnish (sic)."

The 67-year-old and his 52-year-old partner have long been an advocate of gay marriage, and supported the decision for same-sex couples to marry when it became legal in March.

The decision to wed comes nine years after they committed themselves to each other in a lavish ceremony at the Windsor Guildhall which was attended by Victoria Beckham and Helena Bonham Carter among other stars, but it is believed this afternoon's ceremony will be a more low-key affair, with Elton saying earlier this year: "We'll do it very quietly. But we will do it and it will be a joyous occasion and we will have our children."

Posting an image online last night (20.12.14), David indicated their sons Zachary, three, and 23-month-old Elijah would be a key part of the celebrations, writing: "Our little ring bearers are fast asleep, and their shoes are polished and ready for tomorrow's celebration. @EltonJohn #ShareTheLove#DavidFurnish (sic)."