Parker was the daughter of Hugh Power, a businessman, and Laura Nepean Gubbins. She was a cousin of the Duchess of Cornwall. She married the photographer Archie Parker on 6 October 1951. She had two children, Phillip Archibald Reginald Parker (Buffy) and Diana Una-Mary Parker (Baba).
Journalism and fiction
Parker was a supporter of the Conservative Party, who had worked as a journalist for the Daily Mail and Evening Standard. She also spent ten years as social editor of the British magazine, The Tatler.
Parker's first novel, Riches, appeared in October 1987 and has since been widely read internationally. Her other novels include Scandals (1988), Temptations (1989), Enticements (1990),The Palace Affair (1992), Forbidden Feelings (1993), Only the Best (1993), A Guilty Pleasure (1994), False Promises (1995), Taking Control (1996), A Dangerous Desire (1997), Dark Passions (1998), Secrets of the Night (1998), Broken Trust (1999), Sweet Vengeance (2000), Moment of Madness (2001) and Rich Rewards. And also Alexia's Secret (2008) and Veil of Secrets (1990).
In 2016, Parker revealed that she was suffering from glaucoma. She died in April 2019 at the age of 89.Una-Mary Parker, who was a journalist and author who spent 10 years as social editor for Tatler before writing a series of steamy “bonkbuster” novels beginning with the bestselling Riches. She and her husband, the royal photographer Archie Parker, were a high society couple of the 1960s and 1970s, and she regularly made headlines of her own wearing couture dresses by Franka and hats by Madame Vernier at Royal Ascot and smart parties.
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- Obituaries, Telegraph (21 April 2019). "Una-Mary Parker, Tatler magazine's queen bee of the 1970s social scene and writer of bestselling 'bodice-rippers' – obituary". The Telegraph. ISSN 0307-1235. Retrieved 8 May 2019.