After her death, Kathleen's body was sent to Hollywood, California for cremation. Her inurnment was at Hollywood Forever Cemetery.
Kathleen was a lesbian. Her partner was Helen Ramsey. According to British obituaries, she was survived by Helen. In the U.S. obituaries however, Helen was not named.
One of Kathleen most notable roles was an uncredited part in the 1952 musical Singin' in the Rain. She played Jean Hagen's articulate diction coach Phoebe Dinsmore.
She was working on Broadway in a production of "The Full Monty" when she died of lung cancer in 2001.
When she entered UCLA, her role was a music degree. She wanted to become a pianist. The acting bug was too strong in her genes. She never regretted changing from music to acting.
Kathleen was born into show business. Her parents were vaudevillians. She debut in their act at age two.
She got her bachelors degree from University of California in Los Angeles.
In the 1950s while Kathleen was performing at The Music Circus. The music Circus is a a theater-in-the-round in Sacramento, California. She was sitting on a prop chair singing. the chair collapsed under her. The musicians stopped playing and there was dead silence. She got up to her knees, spread her arms and sang, "That's why I love the theater".
She was one of the actresses considered for the part of Alice the houskeeper on "The Brady Bunch", but the role ultimately went to Ann Davis.