Last week Prince William and his family went for a short holiday. They didn't tell anyone until they returned home.
They went on a ski holiday somewhere in the French Alps. Again, they aren't telling exactly where they went.
Yesterday, they released six photos of their holiday, showing the Prince, his wife the Duchess of Cambridge and their children George and Charlotte.
Prince George is now 2 1/2 years old and his sister Princess Charlotte is 10 months old. They looked like they enjoyed the snow.
It is fun to play in the snow – if you dress warmly. The two young children wore heavy winter clothes so they felt quite warm and comfortable.