Shampooed her hair on stage in over a thousand performances of the song 'I'm going to wash that man right out-a my hair' as Nellie Forbush in 'South Pacific'.
She has six grandchildren: Heidi Hagman (born 17 February 1958), Preston Hagman (born May 2, 1962), Timmy Weir (born in New York sometime between 1962 and 1967), Matthew Ternan Weir (born circa 1967), Mary Devon DeMeritt (born in 1975), and the last one born in 1979 to daughter Heller.
She lived in an apartment building called "Highland Towers" for a while in the late 1930s near the corner of Highland and Franklin Avenues in Hollywood, California. She would walk the 4 blocks to work as a singer at the "Cinegrill", a nightclub in the Roosevelt Hotel on Hollywood Boulevard and walk back home again in the evenings. Both buildings, including the nightclub remain today.
She was awarded 2 Stars on the Hollywood Walk of Fame for Radio at 6609 Hollywood Boulevard and for Recording at 1560 Vine Street in Hollywood, California.
Son is actor Larry Hagman.
The play "Kind Sir", in which Mary Martin, starred with Charles Boyer on Broadway, was later made into the Cary Grant-Ingrid Bergman movie Indiscreet (1958).
Turned down the Broadway hits: "Oklahoma," "Kiss Me Kate," "My Fair Lady," "Funny Girl," and "Mame."
Was offered the role of Miss Ellie on "Dallas" (1978) when Barbara Bel Geddes left the show due to health problems. She turned it down. Had she accepted, she would have played the mother of JR Ewing, who was played by Martin's son, Larry Hagman.
Won a Peabody Award for her work in the television film Valentine (1979) (TV) in 1979.
Won four Tony Awards: in 1948, a Special Award for the touring production of "Annie Get Your Gun," cited for "spreading theatre to the country while the original performs in New York;" and three Best Actress (Musical) awards: in 1950, for "South Pacific;" in 1955, for "Peter Pan," a part she recreated in several television versions; and, in 1960, for "The Sound of Music." She was also nominated as Best Actress (Musical) in 1967 for "I Do! I Do!"