Queen Elizabeth II’s niece, Lady Sarah Chatto, who likes to keep a low profile, suddenly became famous after her interview for the BBC documentary “Elizabeth at 90: A Family Tribute.” The daughter of Princess Margaret, Sarah won over people’s hearts with her down-to-earth nature and her affection for the queen.

Sarah, who is 21st in line to the British throne, shares a very close relation with her aunt. The lesser-known royal prefers to live a life away from the spotlight. She is the daughter of Elizabeth’s younger sister Margaret and her husband Antony Armstrong-Jones.

The 52-year-old lives with her husband Daniel Chatto and their two sons, Samuel, 19, and  Arthur, 17. Besides, Sarah also shares a close relation with other senior royals. However, the respect and affection she has for the monarch was evident in the recent BBC documentary in honor of her 90th birthday on April 21, and it appears the feeling is mutual.

The nonagenarian queen is reportedly said to “adore” Sarah, and only permits her to accompany her to her favorite hideaway, Craigowan Lodge in Aberdeenshire. The pair has become very close since the death of Margaret in 2002. Elizabeth shared a very strong bond with her younger sister. Of all her cousins, Sarah is very close to Prince Charles, and they enjoy spending downtime painting together at Balmoral whenever they get an opportunity.

Sarah was also a chief bridesmaid at Charles’ wedding to Princess Diana and is a godmother to their son Prince Harry. She is reportedly very popular among the royal family because of her warm nature and winning ways. She was selected as godmother to Prince Edward’s daughter Louise and the Duke of Gloucester’s daughter Rose.

Sarah grew up at Kensington Palace with her elder brother David and their parents. Margaret divorced her husband when her daughter was only 13. As a teenager, Sarah attended Bedales boarding school in Hampshire, where she took a keen interest in the arts. After completing her graduation, she worked as a wardrobe assistant for the movie, “Heat and Dust,” where she met Daniel Chatto — who she later married.

The couple opted for a low-key service at St. Stephen’s Walbrook church in July 1994. Sarah wore a Jasper Conran gown and the Snowdon Floral Tiara. The couple live in Kensington and has two sons.

Sarah is reportedly expected to play a major role in the Queen’s upcoming official birthday celebrations, including attending Trooping the Color in June.