Seegar was born in Greentown, Indiana, the youngest of five sisters. She was schooled in London and Paris but ultimately graduated from Hollywood High School. She received a degree in drama from Los Angeles City College. Following school, Seegar performed on stage in London, starting her career with Three Men on a Horse. She continued performing in London until the start of World War II, at which point she returned to the United States. Starting in 1940, Seegar performed in Broadway plays, in film, on radio and on television. She was a regular character actor on television throughout the 1950s and 1960s, with roles on Suspense, Perry Mason, and The Donna Reed Show. She played several different roles on Bewitched over the course of the series. In the 1962-63 season of Dennis the Menace, Seegar played Eloise Wilson, the wife of John Wilson. She effectively replaced Sylvia Field, who portrayed Martha Wilson – the original “Mrs. Wilson” – from 1959-62. Field left the series after the death of Joseph Kearns (George Wilson), due to George and Martha Wilson being written out of the series. John Wilson (Gale Gordon) began playing John Wilson, George’s brother, after Kearns’ death. Sara Seegar met Ezra Stone while the two were performing in Horse Fever on Broadway in 1940. They were married on October 5, 1942. They had two children: a son, Josef Seegar Stone (1944-2010) and a daughter, Francine Lida Stone. Sara Seegar Stone died on August 12, 1990, of a cerebral hemorrhage. Her ashes were scattered on Stone Meadows Farm in Langhorne, Pennsylvania.