Actress Patty Duke, who won an Academy Award for her performance as young Helen Keller in "The Miracle Worker" has died at age 69 from complications relating to an intestinal disorder. Duke was 16 years old when she won the Oscar for Best Supporting actress opposite Anne Bancroft in the classic film. Duke also starred in the popular 1960s sitcom "The Patty Duke Show" and went on to star in the feature film "Valley of the Dolls", which was lambasted by critics but which proved to be a major boxoffice success. However, Duke suffered from mental health problems and was diagnosed with bipolar disorder in 1982. Duke's tumultuous personal life extended to her love life, which saw her marry four times. Her husbands included director Harry Falk, rock promoter Michael Tell, actor John Astin and Michael Pearce, who was not in show business. She was the mother of actor Sean Astin, who took the Astin name due to Duke's belief that John Astin was his father. Biological testing later proved this was not the case and that Michael Tell is his real father. Despite her personal problems, Duke worked steadily throughout her career and also became a leading advocate for curing mental health disorders. For more click here.