Gabriella Wilde and the late Princess Margaret are eleventh cousins twice removed, but are much more closely connected by non-blood relationships.

Gabriella Zanna Vanessa Anstruther-Gough-Calthorpe (born 8 April 1989), known professionally as Gabriella Wilde or Gabriella Calthorpe, is an English model and actress.

She has appeared in the films St Trinian’s 2: The Legend of Fritton’s Gold (2009), The Three Musketeers (2011), Carrie (2013), Endless Love (2014), and Wonder Woman 1984 (2020). Her television work includes the Doctor Who episode “The Vampires of Venice” (2010) and she was Caroline Penvenen in the BBC historical drama series Poldark (2016–2019).

Her father, businessman John Anstruther-Gough-Calthorpe, is a former chairman of the Watermark Group, and the grandson of Sir Fitzroy Anstruther-Gough-Calthorpe, 1st Baronet. Her mother, Vanessa Mary Theresa (née Hubbard), is the former wife of socialite Sir Dai Llewellyn, 4th Baronet.

Sir Dai Llewellyn, 4th Baronet was born in Aberdare, the son of Sir Harry Llewellyn, 3rd Baronet, a 1952 Summer Olympics gold medallist showjumper, and the Hon Christine Saumarez, the daughter of the 5th Baron de Saumarez, from a family from Guernsey with British naval ties. Llewellyn’s middle name, St Vincent, came from his great-grandfather James St Vincent Saumarez, 4th Baron de Saumarez,^[2]and originally commemorated the friendship between James Saumarez, 1st Baron de Saumarez, and John Jervis, 1st Earl of St Vincent.

Sir Dai’s younger brother is Sir Roderic Victor Llewellyn, 5th Baronet (born 9 October 1947), a British baronet, landscape gardener, journalist, author, and television presenter.

He had an eight-year relationship with Princess Margaret, Countess of Snowdon, the younger sister of Queen Elizabeth II after meeting at the Café Royal in Edinburgh in September 1973.

In 1976, photographs of the couple in Mustique led to their relationship becoming public knowledge.

According to Anne Tennant, Baroness Glenconner, quoted in the 2018 documentary Elizabeth: Our Queen, the monarch discussed Llewellyn with her after Princess Margaret’s funeral in 2002. She offered Lady Anne thanks for having introduced her sister to him because “he made her really happy.”