The Duke and Duchess of Cambridge have introduced the new prince to the world as they pose for pictures outside of the Lindo Wing at St. Mary's hospital.
Kensington Palace have also shared an image of the new royal baby - who's name has not yet been revealed - along with the caption: "Welcome to the family!"
Check out more pictures of the royal baby below:
first pictures of new prince
1 of 3royal baby
2 of 3royal baby
3 of 3royal baby
Earlier this afternoon Prince William brought Prince George and Princess Charlotte to meet their new baby brother - and Charlotte absolutely stole the show.
She looked adorable as she waved to the press, who were patiently waiting for a first glimpse of the royal baby.
Kensington Palace broke the news that Kate had given birth earlier today with a post on Twitter.
The statement read: "Her Royal Highness The Duchess of Cambridge was safely delivered of a son at 1101hrs.
"The baby weighs 8lbs 7oz.
"The Duke of Cambridge was present for the birth.
"Her Royal Highness and her child are both doing well"