White began her television career in 1939, three months after high school graduation, when she and a classmate sang songs from The Merry Widow on an experimental Los Angeles channel.
Betty začala svoju kariéru v roku 1939, tri mesiace po absolvovaní strednej školy keď spoločne so svojim spolužiakom spievali piesne od Merry Widow na jednom televíznom kanále.