The Duchess is expected to welcome the couple's second child any day now, and a large number of royal watchers have gathered outside St Mary's Hospital in Paddington so they can be among the first to see the new prince or princess.
Many fans have been camped outside the medical centre for a week, and they were given an extra special surprise on Tuesday (28Apr15) when Kensington Palace's household staff arrived to hand out pastries and coffee to all those waiting outside.
Kathy Martin tells the London Evening Standard, "Two men arrived with a box of these wonderful pastries and said they were from the palace as a gift from the Duke and Duchess to say thank you for our support. It was really special - and we noticed straight away that they were wrapped in pink ribbons. We think it's a sign they are having a girl."
A spokesperson for the royals has confirmed the Duke and Duchess sent the breakfast as a thank you gift to fans.
Prince William and his wife, who are already parents to a little boy named Prince George, celebrate their fourth wedding anniversary on Wednesday (29Apr15).