Tracy Louise Somerset, Marchioness of Worcester, née Ward, was born 22 December 1958 in London
She is the sister of British actress Rachel Ward and also has one brother and two half-brothers.
Tracy grew up on her father's estate at Cornwell, Oxfordshire.
After gaining three 'A'-levels, she went to Paris as a model, and then to work at Christie's in London, and then worked in art galleries in New York.
In her early 20s, she trained for an acting career at the Academy of Live and Recorded Arts (ALRA) London and the London Drama School.
As an actress, she is best remembered for her role as Tessa Robinson in C.A.T.S. Eyes and as the first Miss Scarlett in the television drama game show Cluedo.
In 1985 Tracy appeared as "Katz" in the Doctor Who episode Timelash.
Her theatre credits include: Our Day Out (Nottingham Playhouse) and Intimacy (Cafe Theatre).
On 13 June 1987, she married Henry Somerset, Marquess of Worcester, a farmer and chartered surveyor who is heir to the Duke of Beaufort.
Prince Charles, Prince of Wales and his then wife Diana, Princess of Wales attended the wedding.
They have three children.
In 1989, Tracy began working with Friends of the Earth.
Since then, she has been active in green politics as Associate Director of the International Society for Ecology and Culture, a trustee of The Gaia Foundation, the Trustee of The Schumacher Society and the Bath Environment Centre, on the Council of the UK's Soil Association, and a member of the International Forum on Globalisation.
She was a member of the Referendum Party, opposed Britain's involvement in the European Union.
She produced a documentary film called Pig Business, highlighting the environmental and health impact of intensive, industrialised pig farming mass-producing low quality pork.
She backed Julian Assange by pledging bail in December 2010: she lost the money in June 2012 when a judge ordered it to be forfeited, as Assange had sought to escape the jurisdiction of the English courts by entering the embassy of Ecuador.