Dame Agatha Mary Clarissa Mallowan, Lady Mallowan (née Miller, 15 September 1890 – 12 January 1976), usually known by her first married name, Agatha Christie, was an English author known for her 66 detective novels and 14 short-story collections, particularly those revolving around fictional detectives Hercule Poirot (with the novel debut being The Mysterious Affair at Styles in 1920), Tommy and Tuppence (with the novel debut being The Secret Adversary in 1922), and Miss Marple (with the novel debut being The Murder at the Vicarage in 1930). She is widely regarded as one of the greatest writers, particularly in the mystery genre.
A writer during the "Golden Age of Detective Fiction", Christie has been called the "Queen of Crime"—a nickname now trademarked by her estate—or the "Queen of Mystery". She wrote the world's longest-running play, the murder mystery The Mousetrap, which has been performed in the West End of London since 1952. She also wrote six novels under the pseudonym Mary Westmacott. In 1971, she was made a Dame (DBE) by Queen Elizabeth II for her contributions to literature. She is the best-selling novelist of all time, her books having sold more than two billion copies.
Christie was born into a wealthy upper-middle-class family in Torquay, Devon, and was largely home-schooled. She was initially an unsuccessful writer with six consecutive rejections, but this changed in 1920, when The Mysterious Affair at Styles, featuring detective Hercule Poirot, was published. Her first husband was Archibald Christie; they married in 1914 and had one child before divorcing in 1928. Following the breakdown of her marriage and the death of her mother in 1926, she made international headlines by going missing for 11 days. During both world wars, she served in hospital dispensaries, acquiring a thorough knowledge of the poisons that featured in many of her novels, short stories, and plays. Following her marriage to archaeologist Max Mallowan in 1930, she spent several months each year on archaeological excavations in the Middle East and used her first-hand knowledge of this profession in her fiction.
According to UNESCO's Index Translationum, she remains the most-translated individual author. Her novel And Then There Were None is one of the top-selling books of all time, with about 100 million copies sold. Christie's stage play The Mousetrap holds the world record for the longest initial run. It opened at the Ambassadors Theatre in the West End on 25 November 1952, and by 2018, more than 27,500 performances had been given. The play was temporarily closed in 2020 because of COVID-19 lockdowns in London before it reopened in 2021.
In 1955, Christie was the first recipient of the Mystery Writers of America's Grand Master Award. Later that year, Witness for the Prosecution received an Edgar Award for best play. In 2013, she was voted the best crime writer and The Murder of Roger Ackroyd the best crime novel ever by 600 professional novelists of the Crime Writers' Association. In 2015, And Then There Were None was named the "World's Favourite Christie" in a vote sponsored by the author's estate. Many of Christie's books and short stories have been adapted for television, radio, video games, and graphic novels. More than 30 feature films are based on her work.
1890–1907: childhood and adolescence
Agatha Mary Clarissa Miller was born on 15 September 1890, into a wealthy upper middle-class family in Torquay, Devon. She was the youngest of three children born to Frederick Alvah Miller, "a gentleman of substance", and his wife Clarissa "Clara" Margaret (née Boehmer).
Christie's mother Clara was born in Dublin in 1854 to British Army officer Frederick Boehmer and his wife Mary Ann (née West). Boehmer died in Jersey in 1863, leaving his widow to raise Clara and her brothers on a meagre income. Two weeks after Boehmer's death, Mary's sister, Margaret West, married widowed dry-goods merchant Nathaniel Frary Miller, a US citizen. To assist Mary financially, Margaret and Nathaniel agreed to foster nine-year-old Clara; the family settled in Timperley, Cheshire. The couple had no children together, but Nathaniel had a 17-year-old son, Frederick "Fred", from his previous marriage. Fred was born in New York City and travelled extensively after leaving his Swiss boarding school. Clara and he were married in London in 1878. Their first child, Margaret "Madge" Frary, was born in Torquay in 1879. The second, Louis Montant "Monty", was born in Morristown, New Jersey, in 1880, while the family was on an extended visit to the United States.
When Fred's father died in 1869, he left Clara £2,000 (approximately equivalent to £210,000 in 2025); in 1881, they used this to buy the leasehold of a villa in Torquay named Ashfield. Here, their third and last child, Agatha, was born in 1890. She described her childhood as "very happy". The Millers lived mainly in Devon but often visited her step-grandmother/great-aunt Margaret Miller in Ealing and maternal grandmother Mary Boehmer in Bayswater. A year was spent abroad with her family, in the French Pyrenees, Paris, Dinard, and Guernsey. Because her siblings were so much older, and there were few children in their neighbourhood, Christie spent much of her time playing alone with her pets and imaginary companions. She eventually made friends with other girls in Torquay, noting that "one of the highlights of my existence" was her appearance with them in a youth production of Gilbert and Sullivan's The Yeomen of the Guard, in which she played the hero, Colonel Fairfax.
According to Christie, Clara believed she should not learn to read until she was eight; thanks to her curiosity, she was reading by the age of four. Her sister had been sent to a boarding school, but their mother insisted that Christie receive her education at home. As a result, her parents and sister supervised her studies in reading, writing, and basic arithmetic, a subject she particularly enjoyed. They also taught her music, and she learned to play the piano and the mandolin.
Christie was a voracious reader from an early age. Some of her earliest memories were of reading children's books by Mary Louisa Molesworth and Edith Nesbit. When a little older, she moved on to the surreal verse of Edward Lear and Lewis Carroll. As an adolescent, she enjoyed works by Anthony Hope, Walter Scott, Charles Dickens, and Alexandre Dumas. In April 1901, aged 10, she wrote her first poem, "The Cow Slip".
By 1901, her father's health had deteriorated, because of what he believed were heart problems. Fred died in November 1901 from pneumonia and chronic kidney disease. Christie later said that her father's death when she was 11 marked the end of her childhood.
The family's financial situation, by this time, had worsened. Madge married the year after their father's death and moved to Cheadle, Cheshire; Monty was overseas, serving in a British regiment. Christie now lived alone at Ashfield with her mother. In 1902, she began attending Miss Guyer's Girls' School in Torquay, but found adjusting to the disciplined atmosphere difficult. In 1905, her mother sent her to Paris, where she was educated in a series of pensionnats (boarding schools), focusing on voice training and piano playing. Deciding she lacked the temperament and talent, she gave up her goal of performing professionally as a concert pianist or an opera singer.
1907–1918: literary career and marriage
After completing her education, Christie returned to England to find her mother ailing. They decided to spend the winter of 1907–1908 in the warm climate of Egypt, which was then a regular tourist destination for wealthy Britons. They stayed for three months at the Gezirah Palace Hotel in Cairo. Christie attended many dances and other social functions; she particularly enjoyed watching amateur polo matches. While they visited some ancient Egyptian monuments such as the Great Pyramid of Giza, she did not exhibit the great interest in archaeology and Egyptology that developed in her later years. Returning to Britain, she continued her social activities, writing and performing in amateur theatrics. She also helped put on a play called The Blue Beard of Unhappiness with female friends.