Marilyn Davies was born near Llanelli, Wales, and, during her childhood, moved to Solihull, Warwickshire. Her father was a policeman before becoming a technologist for Dunlop Rubber, and her mother was a former actress. She attended Sharmans Cross Secondary Modern School. As a teenager she worked at Woods Farm in Shirley assisting with the horse yard there. She appeared older than her age and at 15 she gained a Saturday job as a clothes model at the Marshall & Snelgrove department store in Birmingham. At 16 she went to London as 'Miss Austin' at the Earls Court Motor Show, and then worked as a dancer at Murray's Cabaret Club in Soho.
Profumo scandal
At Murray's Cabaret Club she met Christine Keeler, who introduced her to her friend, the well-connected osteopathStephen Ward, and to an ex-lover, the slum landlord Peter Rachman. Rice-Davies became Rachman's mistress and was set up in the house in which he had previously kept Keeler, 1 Bryanston Mews West, Marylebone. Rice-Davies often visited Keeler at the house she shared with Ward at Wimpole Mews, Marylebone, and, after Keeler had moved elsewhere, lived there herself, between September and December 1962. On 14 December 1962, while Keeler was visiting Rice-Davies at Wimpole Mews, one of Keeler's boyfriends, John Edgecombe, attempted to enter and fired a gun several times at the door. His trial brought attention to the girls' involvement with Ward's social set, and intimacy with many powerful people, including Viscount Astor at whose stately home of Cliveden Keeler met the War Minister John Profumo. Profumo's brief relationship with Keeler was the centre of the affair that caused him to resign from the government in June 1963, though Rice-Davies herself never met him.
"Well he would, wouldn't he?"
Stephen Ward was found guilty of living off immoral earnings - the trial having been instigated after the embarrassment caused to the government. Whilst being cross-examined at Ward's trial, Rice-Davies made a riposte which has since become famous. When James Burge, the defence counsel, pointed out that Lord Astor denied an affair or even having met her, she dismissed this, giggling "Well he would, wouldn’t he?". By 1979, this phrase had entered the third edition of the Oxford Dictionary of Quotations, and is occasionally referred to with the abbreviation MRDA.
Later celebrity
A Private Eye cover at the time of Profumo had a photograph of "the lovely" Rice-Davies with the caption, "Do you mind? If it wasn't for me – you couldn't have cared less about Rachman". Rice-Davies released a 45EP on the Ember label in May 1964 entitled Introducing Mandy, which included cover versions of songs such as "All I Do Is Dream of You" and "You Got What It Takes". Rice-Davies traded on the notoriety the trial brought her, comparing herself to Nelson's mistress, Lady Hamilton. In 1966 she married an Israeli businessman, Rafi Shauli and moved to Israel. The couple had one daughter together and Rice-Davies converted to Judaism. She also opened nightclubs and restaurants in Tel Aviv. They were called Mandy's, Mandy's Candies and Mandy's Singing Bamboo. In 1980, with Shirley Flack, Rice-Davies wrote her autobiography, Mandy. A year later she appeared in the Tom Stoppard play, Dirty Linen and New-Found-Land. In 1989, she wrote a novel entitled The Scarlet Thread. The Ottoman Empire provided the backdrop and the novel was described as a stirring wartime saga in the spirit of Gone with the Wind. Subsequently, journalist Libby Purves, who had met Rice-Davies when Mandy was published, invited her to join a female re-creation on the River Thames of Jerome K. Jerome's comic novel Three Men in a Boat. This expedition was commissioned by Alan Coren for the magazine Punch, the other members of the party being cartoonist Merrily Harpur and a toy Alsatian to represent Montmorency, the dog in the original story. Purves recounted how she "immediately spotted that this Rice-Davies was a woman to go up the Amazon with" and, among other things, that "only Mandy's foxy charm saved us from being evicted from a lock for being drunk on pink Champagne." Rice-Davies appeared in a number of television and film productions, including Absolutely Fabulous and episode 6 of the first series of Chance in a Million. Her film career included roles in Nana, the True Key of Pleasure, and Absolute Beginners as Colin's mother. In the 1989 film Scandal, about the Profumo affair, Bridget Fonda portrayed Rice-Davies alongside Joanne Whalley as Keeler. She was closely involved in the development of Andrew Lloyd Webber's musical Stephen Ward about Ward's involvement in the Profumo affair, in which she was portrayed by Charlotte Blackledge. The musical opened on 19 December 2013 at the Aldwych Theatre. On Radio 4's Midweek on 5 February 2014, Rice-Davies said of Stephen Ward, "I didn't fall for him, but I did have an affair with him." She once described her life as "one slow descent into respectability". Rice-Davies is portrayed by Ellie Bamber in The Trial of Christine Keeler, a 2019–2020 six-part BBC One television series.