Linda Lennon CBE, Chief Executive of The Royal Parks, said:
"On behalf of the team working across the eight Royal Parks, I would like to congratulate The Duke and Duchess of Cambridge on the arrival of their new baby boy. Kensington Gardens has long been enjoyed by members of the Royal Family and we are excited at the prospect of its newest member having adventures of their own in our family-friendly parks and play-spaces."
Find out more from the Royal Household on the gift protocol to mark the occasion.
A Royal Gun Salute will take place in The Green Park at 2pm to mark the birth of the new baby boy.