Eileen O'Neill

 played Violet, a fictional character come to life, in the second season episode, And Then I Wrote (1965).

Biography
Eileen T. O'Neill was born on July 3, 1939, in Philadelphia, Pennsylvania. She is an actress, known for Burke's Law (1963), Get Smart (1965) and A Man Called Dagger (1968). She was previously married to Richard John Barich and William D. Holmes.

 April 9, 2020 

Source
Eileen O'Neill on the Internet Movie Database. Retrieved on April 9, 2020.