- Full Name: Sienna Elizabeth Mapelli Mozzi
- Father: Mr. Edoardo Mapelli Mozzi
- Mother: Princess Beatrice
- House: Windsor
- Born: September 18, 2021
Sienna Elizabeth Mapelli Mozzi is the first born child of Her Royal Highness Princess Beatrice and Mr. Edoardo Mapelli Mozzi.
Her middle name is a tribute to her great-grandmother, Queen Elizabeth II.
Sienna was born on Saturday, Sept. 18, 2021, at 11:42 p.m. GMT at the Chelsea and Westminster Hospital in London, England. She weighed six pounds and two ounces.
Sienna was christened at the Chapel Royal at St James’s Palace on April 29, 2022. It was a private family event.