From Wikipedia, the free encyclopedia Sara Seegar (July 1, 1914 – August 12, 1990) was an American actress. A performer on stage, film, radio, and television, she may best be remembered for her role as "Mrs. Wilson" in the 1962–63 season of Dennis the Menace. 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 p ...