Svetlana Peters, the only daughter of the Soviet dictator Josef Stalin, has died in the American state of Wisconsin, aged 85.
The county attorney in Richland County says she died of colon cancer on 22 November.
Mrs Peters settled in central Wisconsin after marrying an architect.
They lived in Spring Green, near Madison, the site of Wright's Taliesen workshop, and had a daughter, Olga, then divorced.
As Svetlana Alliluyeva, she defected from the Soviet Union in 1967, leaving two children from two marriages in the former Soviet Union.
Both marriages ended in divorce.
She denounced communism and became an American citizen, but later said she regretted coming to the United States.
She wrote two best-selling memoirs, including Twenty Letters to a Friend that earned her about $US1.7 million.