Lady Annabel Goldsmith has died.

The 91-year-old socialite - who was a close friend of the late Princess Diana - has passed away, leaving her six children, including journalist and film producer Jemima Goldsmith and former Conservative MP Zac Goldsmith, "desperately saddened", according to MailOnline.

Lady Goldsmith was the younger daughter of the 8th Marquess of Londonderry and Queen Elizabeth II attended her "coming-out" ball in 1952.

Goldsmith's first husband Mark Birley famously named the Mayfair nightclub Annabel's after her in 1963.

The couple married in 1954 and had three children Rupert, Robin and India Jane.

They were married for 21 years before Lady Annabel's affair with Sir James Goldsmith.

She went on to marry Sir James in 1978 and they had three more children together, Jemima, Zac and Ben.

Just last month, she attended the wedding of her son Zac to Hum Fleming at St James's Church in Longborough in the Cotswolds.

According to The Sun, she once joked that she was "an incredible mother, rather a good mistress, but not a very good wife".

Lady Annabel was born Annabel Vane-Tempest-Stewart in London in 1934.

She was the daughter of Robin Vane-Tempest-Stewart, Viscount Castlereagh, who went on to become the 8th Marquess of Londonderry, and Romaine Combe, who was the daughter of Major Boyce Combe, from Surrey.

She took on the title of Lady Annabel in 1949 at the age of 15 when her father became Marquess on the death of his father.

She tragically lost both of her parents at a young age, with her mother dying of cancer in 1951 and her father passing away in 1955.