Prince William and Princess Catherine marked a special milestone today as they shared a new picture of a beloved family member that's never been seen before. The Prince and Princess of Wales shared a new photograph of their puppy, Otto, who turns one today.

Otto is Orla's son, from the litter she gave birth to last year and who the Waleses kept.

Alongside the picture, Catherine and William wrote: "Welcome to the family, Otto! 1 today."

Last year, the English Cocker Spaniel reportedly gave birth to four puppies, bringing much joy to the Wales household, after a difficult few months, following Catherine’s cancer diagnosis and treatment.

The prince and princess’s three children, Prince George, Princess Charlotte and Prince Louis, were said to have fallen head over heels with the new pups, who filled their-then home, Adelaide Cottage, with a joyous patter of tiny paws.