Kaaren attended Erasmus Hall High School[2] and Hunter College[3] before being signed by 20th Century Fox in September 1933.

[citation needed] She acted with stock companies and posed as a model for commercial painters and cigarette advertising.

Kaaren appeared in dramatic parts in New York theaters and trained at the Hedgerow Theatre in Philadelphia, Pennsylvania.

[4] She was eventually cast opposite Tim McCoy[5] in Ridin' Gents, a Monogram Pictures production.

(1937) showcased the zany Joe E. Brown, with Kaaren among the supporting players in an RKO Radio Pictures movie about an astrologer.

Her final appearance on film was an uncredited role as the Duchess of Park Avenue (Manhattan) in 1984's The Cotton Club.

Kaaren stepped into the character usually played by Ann Thomas in a Broadway presentation of Chicken Every Sunday.

[citation needed] In 1959, Kaaren appeared in The Royal Family at the Hinsdale Summer Theater in Chicago, Illinois.

[citation needed] Kaaren married stage and screen actor Sidney Blackmer on June 13, 1943, in a civil ceremony in Santa Ana, California.

[7][8] On August 27, 2004, Kaaren died from pneumonia at the Lillian Booth Actors Home in Englewood, New Jersey, aged 92.