London - Sir Elton John and David Furnish will marry in a low-key ceremony in May.
The couple, who were one of the first to enter into a civil partnership in 2005, feel it is their "duty" to get married after same-sex marriage was legalised in the UK on Saturday and feel it would be appropriate to just have a small wedding with their sons Zachary, three, and Elijah, 14 months, and a "couple" of friends.
David told the Las Vegas Review-Journal: "We do like big parties. Over eight years ago, we had 650 people on the 21st of December at our house in Windsor [for our civil ceremony].
"But with the kids, everything is different. I think what we'll do is go to a registry office in England in May, and take the boys with us, and a couple of witnesses."
The couple "don't feel" a marriage is necessary, but think taking the step will encourage other same-sex couples to do the same.
David continued: "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."
Talking about their civil ceremony over eight years ago, David said: "I resigned myself to having a different life. I found it particularly difficult and challenging, because I came from a wonderful marriage; my parents are madly in love still. They've been married over 60 years.
"I wanted what they had. I came from a happy union, and I loved the associations I had from that. I felt very loved and encouraged."
And now the couple are excited times have changed and their lives are so different to what they expected.
David added: "We're living in extraordinary times. My god, 20 years ago, when I started seeing Elton, if you asked me if I'd be able to get married, if I'd be able to have children, it was unthinkable, literally unimaginable." - Bang Showbiz