Svetlana Alliluyeva
Svetlana Iosifovna Alliluyeva , later known as Lana Peters, was the youngest child and only daughter of Soviet Premier Joseph Stalin
Joseph Stalin
Joseph Vissarionovich Stalin was the Premier of the Soviet Union from 6 May 1941 to 5 March 1953. He was among the Bolshevik revolutionaries who brought about the October Revolution and had held the position of first General Secretary of the Communist Party of the Soviet Union's Central Committee...

 and Nadezhda Alliluyeva, Stalin's second wife. In 1967, she caused an international furor when she defected
In politics, a defector is a person who gives up allegiance to one state or political entity in exchange for allegiance to another. More broadly, it involves abandoning a person, cause or doctrine to whom or to which one is bound by some tie, as of allegiance or duty.This term is also applied,...

 and became a naturalized
Naturalization is the acquisition of citizenship and nationality by somebody who was not a citizen of that country at the time of birth....

 citizen of the United States.
Like most children of high-ranking Soviet
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....

 officials, Alliluyeva was raised by a nanny and only occasionally saw her parents.