Princess Beatrice's daughter Sienna Mapelli Mozzi is celebrating her 2nd birthday today (Monday, September 18) and will no doubt be celebrating with her family.The late Queen's great-granddaughter was born at the Chelsea and Westminster Hospital in 2021 to Princess Beatrice and her husband Edoardo Mapelli Mozzi and was named Sienna Elizabeth Mapelli Mozzi.The couple are also parents to Edo's son Christopher Woolf 'Wolfie' from his previous relationship with architect Dara Huang. While an official photograph of Sienna is yet to be released, her doting grandmother Sarah, Duchess of York often speaks about the youngster on her podcast, Tea Talks.