[6][7] She attended Dana Hall Boarding School and Pine Manor Junior College.

[6] Prior to her career in films and TV, she was a stage actress on and off Broadway, in summer stock, and many theatrical venues throughout the US.

In 1948, due to her husband's illness, the family moved from New York City to Los Angeles where she began her movie and TV career.

She appeared under her maiden name (Katharine Warren, which she spelled as shown here) in over 30 films and dozens of television programs including the TV series Alfred Hitchcock Presents (three episodes, 1956–1957) and Bonanza (1961) and the films Jailhouse Rock (1957), The Glenn Miller Story (1954), All the King's Men (1949), and as the mother of Ensign Willie Keith in the big-budget war drama The Caine Mutiny (1954).

From December 1938 until his death in 1951, Warren was married to fellow actor Vernon Clark Chesney.