Sir Elton John has "changed for the better" since becoming a father.

Sir Elton John and David Furnish

Sir Elton John and David Furnish

The 69-year-old singer and his husband David Furnish have two sons, Zachary, six, and four-year-old Elijah - who were born to a surrogate - and he admits it is "unimaginable" how much his life is different now to before he became a parent, and he couldn't be happier with the changes.

He said: "It's unimaginable how the children have changed my life. Years ago I couldn't imagine becoming a dad, but the kids have changed me so much as a person and for the better.

"I love them more and more every day and being a dad is now the most important thing in my life."

And Elton loves seeing his filmmaker spouse dote on their boys.

He said: "David is a great dad, he's fantastic because he knows he comes second now and he doesn't mind. We're very hands on parents."

However, the 'Rocket Man' hitmaker insists their family is complete and they don't want any more children.

He told Closer magazine: "We're not going to have any more kids though - we're done. We're the perfect family unit now."

Every year, Elton throws a party in aid of his self-titled AIDS foundation, which he launched in 1992, and is proud to do as much as he can to raise awareness of the disease.

He said: "It's great to have this party every year. I just want to make sure people get the information about AIDS and what they can do to help.

"It's not a life-threatening disease any more - you can live forever with the illness - but I want people to be aware."