The veteran musician married his partner today at their Windsor estate and a number of stars were expected to attend the celebrations, a spokesman has confirmed.

Sir Elton has taken to social media to post updates about their “big day”, including a photo on Instagram of himself, pen in hand, sitting next to Furnish at a desk, with a piece of paper in front of them, and the caption: “That’s the legal bit done. Now on to the ceremony! #ShareTheLove @DavidFurnish”

Yesterday, he used Twitter to direct people to the couple’s Instagram accounts where he said they would be sharing “special moments” from their wedding.

The Tiny Dancer singer has posted snaps on the photo-sharing website, including an image of a wedding invitation emblazoned with red roses which confirms the wedding date is December 21.

In a post next to the photograph, Sir Elton says he and Furnish “will be posting special moments from our big day”.

This morning, he posted a photograph taken at a window showing a garden, and wrote: “Good morning! Nice day for a wedding. #ShareTheLove”

Last night, the star posted a photograph of two pairs of shoes sitting at a fire, and wrote: “Our little ring bearers are fast asleep and their shoes are polished and ready for tomorrow’s celebration. @DavidFurnish #ShareTheLove”

The famous couple have two sons of toddler age called Zachary and Elijah.

On December 21 2005, they tied the knot in a civil partnership ceremony at the Windsor Guildhall, and a galaxy of stars joined the celebrations that day, including Victoria Beckham, Helena Bonham Carter and Sir Michael Caine.

That service took place in the same venue where the Prince of Wales and Duchess of Cornwall got married.

The pair first met in 1993 when a mutual friend invited British Canadian film-maker Furnish to dinner with the rock legend.

With Furnish by his side, Sir Elton has hosted star-studded bashes and raised huge sums for his Aids Foundation.

Gay marriages became possible in England and Wales for the first time in March. Prime Minister David Cameron hailed the introduction as a “historic day” as many leapt at the chance to tie the knot.

In an interview for US TV in March this year, Sir Elton said: “We’ll do it very quietly. But we will do it and it will be a joyous occasion and we will have our children.”

He added: “For this legislation to come through is joyous, and we should celebrate it. We shouldn’t just say ‘Oh, well, we have a civil partnership, we’re not going to bother to get married’. We will get married.”

And during the interview for NBC’s Today programme, Furnish said of the anticipation from their circle of friends: “The phone’s been ringing off the hook.”

Earlier, Elizabeth Hurley tweeted that she was “v excited” as she was on her way to the wedding.

She included the hashtag “#ShareTheLove”, which Sir Elton has been using in his social media posts.

Carr wrote: “#ShareTheLove at the beautiful wedding of two beautiful people. Wishing Elton & David every happiness. X”