William and Kate found themselves battling in the snowy setting of the French Alps when they took their children Prince George and Princess Charlotte on a short skiing break.
The trip was the first time the family of four had been on holiday together and the Cambridges have released a series of six photographs to mark the event.
A Kensington Palace spokesman said: "This was their first holiday as a family of four and the first time either of the children had played in the snow.
"It was very special and fun short holiday for the family, and they are grateful that John Stillwell was able to capture the moment so well. The Duke and Duchess hope people enjoy the photos."