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,"
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Wednesday's GMB weather for the west of the region
Wednesday's GMB weather for the east of the region
Tuesday evening's weather for the west of the region