Elton John and his partner, David Furnish, are beaming in their first published photo with Zachary Jackson Levon Furnish-John.
The 63-year-old singer said he was there for the birth of his son and "he shot out like a rocket."
Elton John's name is on the birth certificate as well as the biological father. Baby Zach was born by a surrogate mother.
There are reports that the couple bought the baby a $2 million apartment next door, where he will be cared for by round-the-clock nannies.