Princess Eugenie has today shared the first photo of her sister Princess Beatrice's one-year-old daughter, Sienna Mapelli Mozzi.
She published a picture showing her son August Brooksbank and her niece Sienna as they look as they admire penguins during a day out at the London zoo.
Posting the photo to celebrate Earth Day, Eugenie said the two cousins love going to the zoo and looking at animals.
