Born Elizabeth Winifred Boger on December 11, 1923, in Cliffside Park, NJ, her father, William Kidd Boger, was a partner in a small insurance brokerage firm; her mother, Frederica Ammon, was a schoolteacher. Both were Episcopalians. At the age of eight, she was enrolled in the Swift Sisters School of Dance, and recalled performing before Eleanor Roosevelt in 1933, winning an amateur contest shortly thereafter, joining a touring amateur show and performing on local radio, as motivating influences in her Desire to pursue a dance career. She joined the John Robert Powers modeling agency and by the age of twelve was in regular demand. She enrolled in the Professional Children's School but, as it was not accredited, her mother returned her to her local school so that she might eventually attend college. She graduated at fifteen, securing a scholarship to Sarah Lawrence College. However, the Board of Admission considered her too immature for entry and requested she wait one year.