Singer Elton John will officially tie the knot with longtime partner David Furnish on Sunday, his representative has comfirmed, reports people.com.

The couple, who bring up surrogate sons Zachary and Elijah, entered a civil partnership in 2005. The ceremony, which took place in Windsor, was followed by a $2 million reception attended by stars including Donatella Versace, Ringo Starr and Victoria Beckham.

In March, shortly after England's legalisation of same-sex marriage, Furnish hinted to the Las Vegas Review journal that they might be planning a May wedding.

"We don't feel the need to take an extra step legally. But since we're committed for life, we feel it's really important to take that step, and take advantage of that amazing change in legislation. We all live by example," Furnish said at the time.

In recent weeks, wedding rumours have run rampant about their impending nuptials. Various outlets have reported that a private, intimate ceremony will take place at their Windsor estate Dec 21.