Day-Lewis was the father of four children. His first two children, with Constance Mary King, were Sean Day-Lewis (3 August 1931–9 June 2022), a TV critic and writer, and Nicholas Day-Lewis, who became an engineer. His children with Balcon were Tamasin Day-Lewis, a television chef and food critic, and Daniel Day-Lewis, who became an award-winning actor. Sean Day-Lewis wrote a biography of his father, C. Day-Lewis: An English Literary Life (1980).
