Actress Heather Menzies-Urich who starred in the 1965 classic “The Sound of Music” passed away on Sunday night at the age of 68 in her home in Ontario, Canada.

Menzies-Urich was recently diagnosed with brain cancer, her son Ryan told the press. The estate of Rodgers and Hammerstein, which produced the Oscar-winning 1965 musical, also confirmed the death.

“She was an actress, a ballerina and loved living her life to the fullest,” Ryan Urich told Variety. “She was not in any pain but, nearly four weeks after her diagnosis of terminal brain cancer, she had enough and took her last breath on this earth at 7:22 p.m.”

Menzies-Urich was only 15 when “Sound of Music” was released. She played the roll of Louisa von Trapp, the third-oldest of the seven singing children. It was one of the most successful movies in the 1960s, and starred Julie Andrews and Christopher Plummer. It won five Academy Awards, including best picture.

“Heather was part of ‘the family.’ There is really no other way to describe the members of the cast of the movie of ‘The Sound of Music,’ ” Ted Chapin, president and chief creative officer of the Rodgers and Hammerstein Organization, said in a statement.

Menzies-Urich got her start in acting in “The Farmer’s Daughter”, a 1964 TV adaptation of another film, and went on to appear in several movies and TV series Logan’s Run and Vega$, which starred her second husband Robert Urich, whom she married in 1975. He died in 2002, also of cancer, and she formed a foundation in his name to sponsor cancer research.

Heather Menzies was born in Toronto on Dec. 3, 1949. She moved to the United States with her family when she was 11 and attended Hollywood High School. In addition to her son Ryan, she is survived by two daughters, Allison and Emily, several grandchildren and a great-grandchild, Variety reported.