5 Surprising Facts About Princess Beatrice's Daughter, Sienna, After Her Sister's Birth In 2025

The world of the British Royal Family is constantly evolving, and as of , much of the focus is on the youngest generation, particularly Princess Beatrice’s first-born daughter, Sienna Elizabeth Mapelli Mozzi. Born into a unique blended family, Sienna’s life has recently undergone a major transformation with the arrival of a new sibling, shifting her role and her place within the line of succession.

While Princess Beatrice and her husband, Edoardo Mapelli Mozzi, maintain a fiercely private life for their children, the latest updates from 2025 reveal a fuller picture of the family's dynamic, including rare public outings and the significant addition of a new baby sister, Athena Elizabeth Rose, earlier this year. This is everything you need to know about Sienna, her family, and the exciting new chapter she is navigating.

The Mapelli Mozzi Family: A Complete Biography Profile

The family unit centered around Sienna Elizabeth Mapelli Mozzi is a fascinating blend of British royalty and Italian nobility, anchored by her parents, Princess Beatrice and Edoardo Mapelli Mozzi.

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• Princess Beatrice, Mrs Edoardo Mapelli Mozzi
  • Full Name: Beatrice Elizabeth Mary
  • Born: August 8, 1988, at Portland Hospital, London.
  • Parents: Prince Andrew, Duke of York, and Sarah, Duchess of York (Sarah Ferguson).
  • Title: Princess Beatrice of York (by birth); Mrs Edoardo Mapelli Mozzi (by marriage).
  • Education: Goldsmiths, University of London.
• Edoardo Alessandro Mapelli Mozzi
  • Full Name: Edoardo Alessandro Mapelli Mozzi
  • Born: November 19, 1983, in London.
  • Profession: British property developer and CEO of the property consultancy company, Banda Property.
  • Heritage: Descended from an Italian noble family; his father is Count Alessandro Mapelli Mozzi.
  • Previous Child: He has a son, Christopher Woolf ("Wolfie"), from a previous relationship with Dara Huang.
• The Couple's Journey
  • Engagement: September 2019, in Italy.
  • Wedding: July 17, 2020, in a private ceremony at the Royal Chapel of All Saints, Royal Lodge, Windsor.

1. Sienna is Now a Big Sister to Two Siblings

Sienna Elizabeth Mapelli Mozzi, born on September 18, 2021, celebrated her third birthday just a few months before her life changed dramatically.

The most significant update for Sienna in 2025 is her new role as a middle child and a big sister to two siblings, solidifying the family’s unique blended dynamic. While she has always had her half-brother, Christopher Woolf, affectionately known as "Wolfie," the family welcomed a new member in early 2025. Princess Beatrice and Edoardo Mapelli Mozzi announced the birth of their second daughter, Athena Elizabeth Rose Mapelli Mozzi, on January 22, 2025.

This news instantly shifted the focus to the expanded family unit. Sienna, Wolfie, and Athena now form a trio of children at the heart of the Mapelli Mozzi household, often referred to by a close friend as a testament to their successful "blended family" approach.

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2. Her Name is a Tribute to a Royal and Italian Heritage

Sienna’s full name, Sienna Elizabeth Mapelli Mozzi, is a beautiful nod to both sides of her family's heritage. Her first name, Sienna, is Italian, reflecting her father Edoardo’s Italian roots and his family’s noble lineage. The name is also thought to be a tribute to the city of Siena in Tuscany, Italy, where Edoardo's family has historical ties.

Her middle name, Elizabeth, is a clear and poignant tribute to her great-grandmother, the late Queen Elizabeth II. This choice follows a long-standing tradition within the British Royal Family of honoring the monarch. This tradition was further continued with the name of her younger sister, Athena Elizabeth Rose, whose middle name also honors the late Queen.

3. Sienna's Current Position in the Line of Succession is 10th

Following the birth of her younger sister, Athena Elizabeth Rose, in January 2025, Sienna’s position in the British line of succession has been officially updated. Sienna Elizabeth Mapelli Mozzi is currently 10th in line to the throne.

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The line of succession is as follows:

• Princess Beatrice (Sienna’s mother) is 9th.
• Sienna Elizabeth Mapelli Mozzi is 10th.
• Athena Elizabeth Rose Mapelli Mozzi (Sienna’s sister) is 11th.

Despite being a great-granddaughter of the late Queen Elizabeth II and a grandchild of Prince Andrew, Duke of York, Sienna does not automatically hold the title of Princess. Her mother, Princess Beatrice, is a Princess by birth, but Sienna and Athena inherit their status from their father, Edoardo Mapelli Mozzi, who is a commoner in the UK, though he holds a title of Count in his Italian lineage. This means Sienna is officially styled as Miss Sienna Mapelli Mozzi.

4. The Family Enjoyed Rare Public Outings in 2025

Princess Beatrice and Edoardo Mapelli Mozzi are known for keeping their children out of the public spotlight, a choice that contrasts with some other high-profile royal family members. However, in 2025, the family has been seen enjoying a few rare, yet significant, public moments.

One notable report from the summer of 2025 described a rare family outing involving Princess Beatrice, Edoardo, and their "three kids" to celebrate England's women's soccer team winning Euro 2025. This kind of casual, family-focused appearance offers a brief glimpse into their private life and their commitment to shared family experiences, including Wolfie, Sienna, and the new baby, Athena. Additionally, the couple were seen attending events like The Chancery Rosewood Grand Opening in October 2025, demonstrating their balance between family life and public engagements.

5. Her Half-Brother 'Wolfie' Plays a Crucial Role in Her Life

Sienna’s relationship with her older half-brother, Christopher Woolf, nicknamed "Wolfie," is a defining feature of her family life. Wolfie, who is Edoardo’s son from his previous relationship, is an integral part of the Mapelli Mozzi household. Princess Beatrice has consistently spoken about the importance of their blended family and the wonderful bond between the siblings.

Wolfie often attends family events, including the Christmas carol service, and is reportedly a loving older brother to both Sienna and the newest addition, Athena. The commitment of Princess Beatrice and Edoardo to co-parenting and fostering a close relationship between all three children—Wolfie, Sienna, and Athena—is a modern, refreshing approach within the royal sphere. This dynamic ensures Sienna grows up with a strong, supportive, and diverse sibling unit.