Along with an estimated net worth of approximately $5 million, Patty Duke has a reputation in comedy to be proud of. And her net worth was earned over years of hard work. Her career actually began as a child star in 50s soap operas like The Brighter Day and game shows like The $64,000 Question. Interestingly, 3 years after her appearance on that show, she was asked to testify before congress when the game was revealed to have been fixed. One of her most famous roles as a child actress is in the 1962 film The Miracle Worker, playing Helen Keller. From there, her star rose quickly, getting her own TV show called The Patty Duke Show. On it, she played the dual roles of Patty Lane and her "identical cousin" from Scotland.
After that show was canceled in 1967, she began taking more adult roles in films like Valley of the Dolls. In the ensuing years, Duke continued to work on stage and in film and television well into the 2000s. She continues to work today, having recently directed a stage production of The Miracle Worker and landing a regular role on the TV drama The Protector.