Mary Beth Hughes' parents separated while she was still a baby. She was brought up by a grandmother whose dearest wish was to make her an actress. As a result, she started her career at an early age while still a high school student. She starred in the stage version of "Alice in Wonderland" then had parts in "Daddy Long Legs" and "A Midsummer's Night Dream" with the Clifford Brooks company. She graduated from a high school in Washington in June 1937. Mary Beth then worked again with the Brooks company in the summer of 1938. The same year, she was offered a contract by MGM first, soon followed by a 2Oth Century Fox one. By the end of 1949, she sang in night clubs with her husband David Street. She also sang in nightclubs - but alone this time - between 1963 and 1965. It is to be noted that she provisionally left her acting and singing career in 1961 to become a receptionist-technician for an L.A. plastic surgeon.