Svetlana Iosifovna Alliluyeva, later known as Lana Peters, was the youngest child and only daughter of Soviet leader Joseph Stalin and his second wife Nadezhda Alliluyeva. In 1967, she became an international sensation when she defected to the United States and, in 1978, became a naturalized citizen. From 1984 to 1986, she briefly returned to the Soviet Union and had her Soviet citizenship reinstated. She was Stalin's last surviving child.

Nadezhda Sergeyevna Alliluyeva was the second wife of Joseph Stalin. She was born in Baku to a friend of Stalin, a fellow revolutionary, and was raised in Saint Petersburg. Having known Stalin from a young age, she married him when she was 17, and they had two children. Alliluyeva worked as a secretary for Bolshevik leaders, including Vladimir Lenin and Stalin, before enrolling at the Industrial Academy in Moscow to study synthetic fibres and become an engineer. She had health issues, which had an adverse impact on her relationship with Stalin. She also suspected he was unfaithful, which led to frequent arguments with him. On several occasions, Alliluyeva reportedly contemplated leaving Stalin, and after an argument, she fatally shot herself early in the morning of 7 November 1932.