As a father-of-four, the footballer is well placed to advise new parents on what to expect, but during a chat with Sky News over the weekend, he seemed to suggest William and Kate will be fine on their own.
"They will be amazing parents because they are so loving towards children," he said.
He said: "William has been in all of our lives for so many years. We've seen him grow from that young boy into an unbelievable gentleman and that is an amazing quality. That, as a father, is so important."
David, 37, who is a Sky Ambassador, also had an inspired idea for a possible baby name… David! "It's pretty good, it's not bad. I think they should go for David if it's a boy."
Prince David. It has a ring to it…
David and William became friends while working together on the London 2012 bid, with David and his wife Victoria even attending the royal wedding in April 2011.
Meanwhile, the Duchess of Cambridge's due date is thought to have come and gone; although the palace never confirmed the actual date, it was widely speculated to be 13 July.
Media from all around the world are currently camped outside the St. Mary's Hospital in Paddington, where Kate will deliver her child at the private Lindo Wing, where William and his brother Harry were born.
A spokesperson for the palace previously said William and Kate had chosen not to learn the sex of their child ahead of the birth.
It has been confirmed, however, that the royal baby will bear the title Prince or Princess of Cambridge.
Kate Middleton's pregnancy as it happened - pictures: