Sir Elton John says he regrets not becoming a father sooner and would love another child.
Speaking to ITV1's Daybreak Elton described how becoming a dad to Zachary was an "incredible experience":
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. We definitely will [have another child]. At what stage we don't know, but we definitely will. I don't want him to be an only child.
Elton described how he is a 'hands-on' dad:
The first thing I do every morning is have breakfast with him. He shares my breakfast. Whatever I have, he wants. He has my boiled egg and I have his pineapple or vice versa. I sound like I'm the only person who has ever had a kid - everyone's been through this. But for me, it's an incredible difference to what life was before.
And it seems growing up in the company of one of the world's most famous musical names is already influencing Zachary, who's showing signs of a musical talent.
He loves the piano, he sits down and plays it - he doesn't just bang it, he plays it like I play it. He's never seen a show, he's too young, but he comes out when the stadium is empty and sits down on the piano stool with me and he plays and looks into the microphone and thinks, 'What the hell is going on here?' But he knows what I do because somebody showed him the Jubilee on tape and he went, 'Daddy!'
You can watch Daybreak's full interview with Sir Elton John here.