It was a full house at Sandringham as four generations gathered for the festivities on the Norfolk estate.
The Duke and Duchess of Cambridge looked relaxed as they made the journey to St Mary Magdalene Church on foot holding hands.
But there was no sign of Prince George as temperatures stayed just above freezing.
Wearing a tartan Alexander McQueen coat and a hat by Gina Foster, Kate smiled and waved to the crowds.
As she left the service, she stopped to chat to Cicely Howard, 75, from Great Yarmouth, who asked about the baby.
"She told me he was having a lovely day but was more interested in the wrapping paper than the presents,"
More top news
A report by a group of MPs urges Ofcom to offer compensation to customers who do not get the internet speeds they pay for.
Philippa has the weekend weather for the east
Philippa has the weekend weather for the west