Kathleen Palmer Hart Bibb Foster (September 6, 1889 – June 30, 1957) was an American concert singer and voice teacher.
She was also the model for the character "Julia Ray" in the popular Betsy-Tacy book series, written by her younger sister.
Her younger sister Maud Hart Lovelace became a successful author, and their childhood home is now a museum about their family and her work.
[7] During World War I Kathleen Hart Bibb performed at benefits for the troops,[8] and for the American Red Cross.
[15] Kathleen Hart Foster died in 1957, aged 67 years, in Salt Lake City, Utah.