Martha Sitwell

Martha Sitwell, Lady Sitwell (née de Blank) is a British television personality, socialite, and former model. She is the former wife of Sir George Reresby Sacheverell Sitwell, 8th Baronet. In 2026, she joined the cast of the British reality television series Ladies of London.

Early life and education Lady Sitwell grew up in an affluent, well-connected family. She was educated at boarding schools and at a girl's comprehensive school in London.

Career Lady Sitwell worked as a fashion stylist, designer, and make-up artist. She was also a model for Vivienne Westwood.

Personal life She was married to the businessman and aristocrat Sir George Reresby Sacheverell Sitwell, 8th Baronet for a decade before they divorced in 2017. During their marriage, she managed the Sitwell family seat, Weston Hall. She was later in a relationship with Harry Primrose, Lord Dalmeny that ended in 2022, prior to his second marriage.

She has one son, Conor, whom she gave birth to when she was seventeen years old.

Filmography +Martha Switwell's television work Year Title Role Notes 2026 Ladies of London Herself Main Cast