Anna Marie "Patty" Duke (born December 14, 1946) is an American actress of stage, film, and television. First becoming famous as a child star, winning an Academy Award for Best Supporting Actress at age 16, and later starring in her eponymous sitcom for three years. She was later elected president of the Screen Actors Guild from 1985 to 1988.
Duke was diagnosed with bipolar disorder in 1982, and since then has devoted much of her time to advocating and educating the public on mental health issues.
Duke was born Anna Marie Duke in Elmhurst, Queens, New York, the daughter of Frances (née McMahon), a cashier, and John Patrick Duke, a handyman and cab driver. Her father was Irish American and her maternal grandmother was German.