There's something about the way you look... Four-month-old Zachary appears to look like one of his fathers Elton John as he sits in his pushchair in New York
They left it up to chance to determine who would be the biological father of their son Zachary.
But there's no mistaking Sir Elton John and David Furnish's baby boy is looking increasingly like the singer.
With his rounded cheeks, button nose and light brown hair, it's appears that Elton may indeed be the father.
Chip off the old block? Zachary looks more like Elton than DavidWhile his parents were busy working, the four-month-old enjoyed a push around New York's Central Park by his nanny.
The little boy looked comfortable as he sat in a £680 black Bugaboo Chameleon pushchair gazing up at his nanny.
When Elton, 64, and civil partner David Furnish, 48, presented their son to the world in an exclusive magazine deal in January, they said they had left it to chance to determine who would be the biological father.
Life of privilege: The little boy surveyed the world around him as he was pushed through the park by his nannyThe couple became parents through a surrogate, who gave birth to Zachary in a California hospital on Christmas Day last year.
During the conception process, the mixing of their semen specimens was allowed - a process which is currently banned in the UK - before being used to fertilise a previously chosen egg.
In January, Furnish told OK! magazine: 'We both contributed. For the time being we don't have a clue. We look at him every day and at the moment he has Elton's nose and my hands.
Feeling sleepy? After checking out the big wide world, little Zachary looked ready to doze off'Neither of us care. He's our child. The important thing is that he's healthy and happy and loved.'
Elton is currently on tour before he plans a second residency in Las Vegas from September - giving the couple a more long-term base to raise baby Zachary.
But the pair will pop over to London next week as guests for the Royal Wedding of Prince William and Kate Middleton.
Elton told Canada's CTV: 'We do have an invitation. I’ve been trying to be discreet.
Meet the parents: Elton and David Furnish at a party in New York earlier this month'Kate is Diana in personality. She is very discreet, she is a very beautiful girl. They have been together a long time and I think she has handled the pressure so much.'
But the straight-talking singer admitted he wasn't impressed that William had given Kate his mother Diana's sapphire engagement ring.
He said: 'It is none of my business, but I thought it was a little odd.'
Strolling in the sunshine: The cute little boy is pushed through Central Park by his nannysource: dailymail