His parents first announced they were expecting him in an Instagram photo posted in November of 2015. They announced their engagement in February of 2016.
He was born at 7:21 PM on May 5th weighing 6 lbs, 12 oz and measuring at 19.5 inches long.
He arrived three weeks early when he was born. His parents married a month after his birth.
His father Michael Phelps won a total of 28 Olympic medals, 23 of them gold.