Nin was raised a Roman Catholic but left the church when she was 16 years old. She spent her childhood and early life in Europe. Her parents separated when she was two; her mother then moved Nin and her two brothers, Thorvald Nin and Joaquín Nin-Culmell, to Barcelona, and then to New York City, where she attended high school. Nin dropped out of high school in 1919 at age sixteen, and according to her diaries, Volume One, 1931–1934, later began working as an artist's model. After being in the United States for several years, Nin had forgotten how to speak Spanish, but retained her French and became fluent in English.thumb|Anaïs Nin as a teenager, On March 3, 1923, in Havana, Cuba, Nin married her first husband, American Hugh Parker Guiler (1898–1985), a banker and artist from Boston, later known as "Ian Hugo", when he became an experimental filmmaker in the late 1940s. The couple moved to Paris the following year, where Guiler pursued his banking career and Nin began to pursue her interest in writing; in her diaries she also mentions having trained as a flamenco dancer in Paris in the mid-to-late 1920s with Francisco Miralles Arnau. Her first published work was a critical 1932 evaluation of D. H. Lawrence called D. H. Lawrence: An Unprofessional Study, which she wrote in sixteen days.
Nin was raised a Roman Catholic but left the church when she was 16 years old. She spent her childhood and early life in Europe. Her parents separated when she was two; her mother then moved Nin and her two brothers, Thorvald Nin and Joaquín Nin-Culmell, to Barcelona, and then to New York City, where she attended high school. Nin dropped out of high school in 1919 at age sixteen, and according to her diaries, Volume One, 1931–1934, later began working as an artist's model. After being in the United States for several years, Nin had forgotten how to speak Spanish, but retained her French and became fluent in English.thumb|Anaïs Nin as a teenager, On March 3, 1923, in Havana, Cuba, Nin married her first husband, American Hugh Parker Guiler (1898–1985), a banker and artist from Boston, later known as "Ian Hugo", when he became an experimental filmmaker in the late 1940s. The couple moved to Paris the following year, where Guiler pursued his banking career and Nin began to pursue her interest in writing; in her diaries she also mentions having trained as a flamenco dancer in Paris in the mid-to-late 1920s with Francisco Miralles Arnau. Her first published work was a critical 1932 evaluation of D. H. Lawrence called D H. Lawrence: An Unprofessional Study, which she wrote in sixteen days.