Lady Milford Haven is the daughter of Anthony Nigel Steel of Rock House Farm,
Lower Froyle, Hampshire, and his wife, Anne Husted. She has one brother and one sister. Her sister, Louise Helen Steel (born 1956), married
Count Don Ludovico del Balzo,
dei Duchi di Presenzano, son of Count
Don Giulio del Balzo,
dei Duchi di Presenzano and
Donna Maria Elisabetta,
dei Marchese Cavalletti dell'Oliveto Sabino, on 30 April 1983; they have three children. The Marchioness enjoys playing
polo. Until 2020, she was an ambassador of the watch company
Jaeger-LeCoultre for over 15, and she was made a
brand ambassador for
Arthur J. Gallagher & Co. in 2019. She has also worked as a journalist and was a special editor for the
Tatler magazine between October 19982006, and has also written for magazines such as
GQ,
The Times,
Homes & Gardens. several locations were added to the Marchioness' charity in
Newcastle upon Tyne and London, and through fundraising, the charity plans to raise £10 million more to open new locations in Birmingham and Bristol in the future (). She was also made a co-chair for the British Alliance of Suicide Prevention Charities (TASC) in 2010. ==Marriages and children==