Oscar-winning actress Joan Fontaine died Sunday, her longtime friend Noel Beutel said Monday. She was 96. Fontaine died "very peacefully" in her sleep of natural causes, Beutel said. She was in her Carmel, California, home. She is survived by her older sister, actress Olivia de Havilland -- with whom she had not spoken for decades. Fontaine was born Joan de Beauvoir de Havilland in 1916 in Tokyo, Japan, where her British father was a patent lawyer and teacher. She and her sister moved to Saratoga, California, with their mother in 1919 when her parents separated. Fontaine was a teenager when she began her acting career as Joan Burfield in the 1935 film "No More Ladies." She later adopted the stage name Fontaine -- the name of her mother's second husband. She wrote in her 1978 autobiography, "No Bed of Roses," that her mother, who was an actress, began encouraging the rivalry with her older sister at an early age. The feud extended to their careers when both sisters were nominated for best actress Oscars in 1942. Fontaine, who was nominated for Alfred Hitchcock's "Suspicion," beat her sister Olivia de Havilland, who was nominated for "Hold Back the Dawn." De Havilland won the first of her two Oscars in 1947 when she was given the best actress award for "To Each His Own." De Havilland and Fontaine remain the only sisters who have best-actress Academy Awards. The long-standing feud with de Havilland was at such a peak during one Oscar winners' reunion in 1979 that they had to be seated on opposite ends of the stage. "I was shocked and saddened to learn of the passing of my sister, Joan Fontaine ... and I appreciate the many kind expressions of sympathy that we have received," a statement released by Olivia de Havilland to CNN said. 
Based on the previous passage, How old was Joan when she wrote an autobiography? 
Is "Sixty Two" a correct answer?
Yes
The passage says "Fontaine was a teenager when she began her acting career as Joan Burfield in the 1935 film No More Ladies. She later adopted the stage name Fontaine -the name of her mother's second husband."
It also says that: 
"She wrote in her 1978 autobiography, 'No Bed of Roses,' that her mother, who was an actress... (and) at such peak during one Oscar winners' reunion in 1979..." 
This indicates that Joan became famous after she published "No Bed Of Roses". So it can be inferred from this information alone that Joan would have been older than 62 by then and hence must have written the book while being over 62 years old or else wouldn't have become famous until much later.


So Yes is correct answer to.