Elinor Donahue – 84

Anyone who grew up during the ’50s knows who Elinor Donahue is. She became famous back then for the sitcom Father Knows Best, where she played Betty Anderson, the eldest child of Jim and Margaret Anderson. Before she got cast, she actually changed her name from Elinor Glyn to Elinor Donahue. At 18 months old, her mother let her join a dance class, and she eventually started working on the radio in her hometown Tacoma at five years old. Donahue, who officially left the industry in 2011, is now in her 80s with four grown sons.