Frank Sinatra was married four times.
His first marriage was to Nancy Barbato, whom he married in 1939. They had three children—Nancy, Frank Jr., and Tina—before divorcing in 1951. Sinatra then married actress Ava Gardner later that year. Their turbulent relationship ended in separation in 1953, although their divorce was not finalized until 1957.
Sinatra's third marriage was to actress Mia Farrow in 1966. They divorced in 1968 after a short marriage complicated by conflicting film schedules and growing personal differences. In 1976, he married Barbara Marx, who remained his wife until his death in 1998.
The number four counts legal marriages, not every major romance or engagement. Sinatra was romantically linked to several other famous women, including Lauren Bacall, Juliet Prowse, and Angie Dickinson, but those relationships did not create additional marriages. His four wives were Nancy Barbato, Ava Gardner, Mia Farrow, and Barbara Marx.