Lady Caroline was born in London to a wealthy, aristocratic Anglo-Irish family. Her parents were Basil Sheridan Hamilton-Temple-Blackwood, 4th Marquess of Dufferin and Ava, and his wife Maureen Guinness, the brewery heiress. After what she called being "scantily educated" at boarding schools in England and Switzerland, and at a finishing school in Oxford, she made her debut in society at a ball in 1949. In the 1950s, she was a striking figure in London's bohemian circles. She became an artists' muse, journalist, novelist, and writer. She was married three times and had four children: daughters Natalya, Evgenia, and Ivana, and son Sheridan. See her biography, Dangerous Muse: The Life of Lady Caroline Blackwood by Nancy Schoenberger.