Mary Eleanor Donahue (born April 19, 1937), credited as Elinor Donahue, is an American actress, best remembered today for playing the role of Betty Anderson, the eldest child of Robert Young and Jane Wyatt, on the 1950s American sitcom Father Knows Best. Donahue achieved stardom for her role as the elder daughter, Betty, on the television family series Father Knows Best. Her co-stars were Robert Young, Jane Wyatt, Billy Gray as her younger brother, James "Bud" Anderson, Jr., and Lauren Chapin as her younger sister, Kathy. Donahue was a musical judge in ABC's Jukebox Jury (1953–54). While in the first season of Father Knows Best she also appeared on The Ray Bolger Show, starring Ray Bolger as a song-and-dance man. Thereafter, she was cast with James Best, Ann Doran, and J. Carrol Naish in the 1956 episode "The White Carnation" of the re...