The couple is believed to have had their second child – whose gender has not been made public - with the same California-based surrogate mother who bore their first son, Zachary, on Christmas Day 2010, according to The New York Post.
Sources told the paper the surrogate - whose identity is being kept secret - also gave birth to Camille Grammer’s kids. Elton’s rep Fran Curtis refused to confirm or deny the new arrival, telling the NY Post: “We never discuss our clients’ personal lives.”
In past interviews, the Rocket Man singer has gushed about being a father to Zachary, saying: "I think it changes everybody. It's the most wonderful thing that you could possibly go through. I regret a little bit that I didn't do it sooner, but he has changed our lives. Everything is about him now.
"He's gorgeous, he travels brilliantly, he so loves people, and it makes our lives. He's the icing on the cake."
Elton and David met in 1993 after a friend introduced them to one another at a dinner at the singer’s mansion. The Goodbye Yellow Brick Road singer, 65, has said that Furnish, 50, helped him overcome his addictions to alcohol and drugs.
The couple formalized their relationship in a civil ceremony on December 21, 2005 at historic 17th century Guildhall in Windsor, England.