Sir Elton John [ Images ] has posed for his first public photograph with his newborn son.

The Rocket Man singer and his civil partner David Furnish [ Images ] welcomed a son called Zachary on Christmas via a surrogate mother.

After a month of being new dads, the couple has now posed for a family portrait for OK! magazine, showing off their tiny tot.

The 63-year-old also confirmed he was present at the birth, and couldn't believe how fast his child arrived into the world.

'He shot out like a rocket. There just aren't proper words to describe that feeling. It's indescribable. It was just, ''We have a son'',' the Sun quoted him as telling OK! magazine.