Kate Middleton and her family took a ski vacation in the Alps sometime between Christmas at Sandringham and her 43rd birthday on Jan. 9, which she is thought to have celebrated at home.

The Prince and Princess of Wales took their children Prince George, Princess Charlotte and Prince Louis on a skiing trip earlier this month

Princess Kate Middleton took a ski trip with her family before announcing her cancer is in remission, The Mail on Sunday reports. Middleton, 43, and Prince William, 42, traveled from their home in the U.

In another sign of the progress she's making in her recovery following her cancer treatment, Kate Middleton apparently felt well enough after the holidays for one of her longtime favorite activities: Skiing.

Kate Middleton and Prince William went on a discreet ski trip with their family over the New Year, and we, the people, are only just hearing about it. According to the Daily Mail, the couple “slipped away from their home at Anmer on the Sandringham estate shortly after Christmas” and spent several days in the Alps—where they were joined by Kate’s family.