NEW YORK — The engagement of Frank Sinatra to 21-year-old actress Mia Farrow was announced today [July 13] by her mother, actress Maureen O’Sullivan. Miss O’Sullivan said the 50-year-old singer-actor and her daughter will be married in the United States between Thanksgiving and Christmas.
‘‘I couldn’t be more delighted,’’ said Miss O’Sullivan, who is only four years older than Mr. Sinatra. ‘‘Frank is a wonderful person and I know they will be very happy.’’ Earlier in the day, Miss Farrow denied that she was announcing her engagement, although she was wearing a new nine-carat diamond ring. — New York Herald Tribune, European Edition, July 14, 1966