The royal baby appeared to wave as he was introduced to the crowds outside the hospital for the first time.
The Duke and Duchess of Cambridge proudly showed the world their baby son, a future king, before taking him home tonight.
It's been revealed the new Royal parents and their new son will be making a family home at Anmer on the Sandringham Estate in Norfolk.
The Duke of Cambridge waved to the cheering crowds as he drove his wife, the Duchess of Cambridge, and their new-born son to Kensington Palace.
Asked about changing nappies William said: "We've done that already," and Kate said "he's done his first nappy already".
The Duke looked at ease holding his son and after speaking to the press for a few minutes.
"We're very emotional," said Kate. "It's such a special time.
Asked how much hair the new prince has, William replied: "He's got way more than me, thank god!"
The Duke and Duchess of Cambridge emerged from St Mary's Hospital with their new baby son tonight to loud cheers from well wishers.
The Duchess said: "It's very emotional, it's such a special time. I think any parent will know what this feeling feels like."
The Duke and Duchess of Cambridge have left hospital with their baby in a car driven by Prince William himself.