The 'Rocket Man' singer and his husband Furnish, who already have a two-year-old son, Zachary, together, are said to have welcomed another child into the world via a surrogate.
According to the New York Post, the couple used the same California-based surrogate who gave birth to Zachary on Christmas Day 2010.
No further details about the birth or the baby have been revealed.
Last November, it was revealed John and Furnish were expecting their second child but had decided never to reveal the identity of the surrogate.
John, 65, loves being a father and has previously said he regretted waiting so long to have a child.
"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 had said.